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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"/><title>7 SMTP: Sending E-Mail</title><link rel="stylesheet" type="text/css" href="../scribble.css" title="default"/><link rel="stylesheet" type="text/css" href="../racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-style.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../doc-site.css" title="default"/><script type="text/javascript" src="../scribble-common.js"></script><script type="text/javascript" src="../manual-racket.js"></script><script type="text/javascript" src="../doc-site.js"></script><script type="text/javascript" src="../local-redirect/local-redirect.js"></script><script type="text/javascript" src="../local-redirect/local-user-redirect.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--></head><body id="doc-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist tocviewlisttopspace"><div class="tocviewtitle"><table cellspacing="0" cellpadding="0"><tr><td style="width: 1em;"><a href="javascript:void(0);" title="Expand/Collapse" class="tocviewtoggle" onclick="TocviewToggle(this,"tocview_0");">▼</a></td><td></td><td><a href="index.html" class="tocviewlink" data-pltdoc="x">Net:<span class="mywbr"> </span> Networking Libraries</a></td></tr></table></div><div class="tocviewsublisttop" style="display: block;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1 </td><td><a href="http-client.html" class="tocviewlink" data-pltdoc="x">HTTP Client</a></td></tr><tr><td align="right">2 </td><td><a href="url.html" class="tocviewlink" data-pltdoc="x">URLs and HTTP</a></td></tr><tr><td align="right">3 </td><td><a href="uri-codec.html" class="tocviewlink" data-pltdoc="x">URI Codec:<span class="mywbr"> </span> Encoding and Decoding URIs</a></td></tr><tr><td align="right">4 </td><td><a href="websocket.html" class="tocviewlink" data-pltdoc="x">Web<span class="mywbr"> </span>Socket</a></td></tr><tr><td align="right">5 </td><td><a href="ftp.html" class="tocviewlink" data-pltdoc="x">FTP:<span class="mywbr"> </span> Client</a></td></tr><tr><td align="right">6 </td><td><a href="sendurl.html" class="tocviewlink" data-pltdoc="x">Send URL:<span class="mywbr"> </span> Opening a Web Browser</a></td></tr><tr><td align="right">7 </td><td><a href="" class="tocviewselflink" data-pltdoc="x">SMTP:<span class="mywbr"> </span> Sending E-<wbr></wbr>Mail</a></td></tr><tr><td align="right">8 </td><td><a href="sendmail.html" class="tocviewlink" data-pltdoc="x"><span class="stt">sendmail</span>:<span class="mywbr"> </span> Sending E-<wbr></wbr>Mail</a></td></tr><tr><td align="right">9 </td><td><a href="head.html" class="tocviewlink" data-pltdoc="x">Headers:<span class="mywbr"> </span> Parsing and Constructing</a></td></tr><tr><td align="right">10 </td><td><a href="imap.html" class="tocviewlink" data-pltdoc="x">IMAP:<span class="mywbr"> </span> Reading Mail</a></td></tr><tr><td align="right">11 </td><td><a href="pop3.html" class="tocviewlink" data-pltdoc="x">POP3:<span class="mywbr"> </span> Reading Mail</a></td></tr><tr><td align="right">12 </td><td><a href="mime.html" class="tocviewlink" data-pltdoc="x">MIME:<span class="mywbr"> </span> Decoding Internet Data</a></td></tr><tr><td align="right">13 </td><td><a href="base64.html" class="tocviewlink" data-pltdoc="x">Base 64:<span class="mywbr"> </span> Encoding and Decoding</a></td></tr><tr><td align="right">14 </td><td><a href="qp.html" class="tocviewlink" data-pltdoc="x">Quoted-<wbr></wbr>Printable:<span class="mywbr"> </span> Encoding and Decoding</a></td></tr><tr><td align="right">15 </td><td><a href="dns.html" class="tocviewlink" data-pltdoc="x">DNS:<span class="mywbr"> </span> Domain Name Service Queries</a></td></tr><tr><td align="right">16 </td><td><a href="nntp.html" class="tocviewlink" data-pltdoc="x">NNTP:<span class="mywbr"> </span> Newsgroup Protocol</a></td></tr><tr><td align="right">17 </td><td><a href="tcp.html" class="tocviewlink" data-pltdoc="x">TCP:<span class="mywbr"> </span> Unit and Signature</a></td></tr><tr><td align="right">18 </td><td><a href="tcp-redirect.html" class="tocviewlink" data-pltdoc="x">TCP Redirect:<span class="mywbr"> </span> <span class="RktSym"><span class="RktStxLink">tcp^</span></span> via Channels</a></td></tr><tr><td align="right">19 </td><td><a href="ssl-tcp-unit.html" class="tocviewlink" data-pltdoc="x">SSL Unit:<span class="mywbr"> </span> <span class="RktSym"><span class="RktStxLink">tcp^</span></span> via SSL</a></td></tr><tr><td align="right">20 </td><td><a href="cgi.html" class="tocviewlink" data-pltdoc="x">CGI Scripts</a></td></tr><tr><td align="right">21 </td><td><a href="cookie.html" class="tocviewlink" data-pltdoc="x">Cookie:<span class="mywbr"> </span> HTTP Client Storage</a></td></tr><tr><td align="right"></td><td><a href="doc-bibliography.html" class="tocviewlink" data-pltdoc="x">Bibliography</a></td></tr><tr><td align="right"></td><td><a href="doc-index.html" class="tocviewlink" data-pltdoc="x">Index</a></td></tr></table></div></div><div class="tocviewlist"><table cellspacing="0" cellpadding="0"><tr><td style="width: 1em;"><a href="javascript:void(0);" title="Expand/Collapse" class="tocviewtoggle" onclick="TocviewToggle(this,"tocview_1");">►</a></td><td>7 </td><td><a href="" class="tocviewselflink" data-pltdoc="x">SMTP:<span class="mywbr"> </span> Sending E-<wbr></wbr>Mail</a></td></tr></table><div class="tocviewsublistbottom" style="display: none;" id="tocview_1"><table cellspacing="0" cellpadding="0"><tr><td align="right">7.1 </td><td><a href="#%28part._.S.M.T.P_.Functions%29" class="tocviewlink" data-pltdoc="x">SMTP Functions</a></td></tr><tr><td align="right">7.2 </td><td><a href="#%28part._.S.M.T.P_.Unit%29" class="tocviewlink" data-pltdoc="x">SMTP Unit</a></td></tr><tr><td align="right">7.3 </td><td><a href="#%28part._.S.M.T.P_.Signature%29" class="tocviewlink" data-pltdoc="x">SMTP Signature</a></td></tr></table></div></div></div><div class="tocsub"><div class="tocsubtitle">On this page:</div><table class="tocsublist" cellspacing="0"><tr><td><span class="tocsublinknumber">7.1<tt> </tt></span><a href="#%28part._.S.M.T.P_.Functions%29" class="tocsubseclink" data-pltdoc="x">SMTP Functions</a></td></tr><tr><td><a href="#%28def._%28%28lib._net%2Fsmtp..rkt%29._smtp-send-message%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">smtp-<wbr></wbr>send-<wbr></wbr>message</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._net%2Fsmtp..rkt%29._smtp-sending-end-of-message%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">smtp-<wbr></wbr>sending-<wbr></wbr>end-<wbr></wbr>of-<wbr></wbr>message</span></span></a></td></tr><tr><td><span class="tocsublinknumber">7.2<tt> </tt></span><a href="#%28part._.S.M.T.P_.Unit%29" class="tocsubseclink" data-pltdoc="x">SMTP Unit</a></td></tr><tr><td><a href="#%28def._%28%28lib._net%2Fsmtp-unit..rkt%29._smtp~40%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">smtp@</span></span></a></td></tr><tr><td><span class="tocsublinknumber">7.3<tt> </tt></span><a href="#%28part._.S.M.T.P_.Signature%29" class="tocsubseclink" data-pltdoc="x">SMTP Signature</a></td></tr><tr><td><a href="#%28form._%28%28lib._net%2Fsmtp-sig..rkt%29._smtp~5e%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">smtp^</span></span></a></td></tr></table></div></div><div class="maincolumn"><div class="main"><div class="navsettop"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, "6.1", "../");" onfocus="this.style.color="black"; this.style.textAlign="left"; if (this.value == "...search manuals...") this.value="";" onblur="if (this.value.match(/^ *$/)) { this.style.color="#888"; this.style.textAlign="center"; this.value="...search manuals..."; }"/></form> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.1");">top</a></span><span class="navright"> <a href="sendurl.html" title="backward to "6 Send URL: Opening a Web Browser"" data-pltdoc="x">← prev</a> <a href="index.html" title="up to "Net: Networking Libraries"" data-pltdoc="x">up</a> <a href="sendmail.html" title="forward to "8 sendmail: Sending E-Mail"" data-pltdoc="x">next →</a></span> </div><h3 x-source-module="(lib "net/scribblings/net.scrbl")" x-part-tag=""smtp"">7<tt> </tt><a name="(part._smtp)"></a><a name="(mod-path._net/smtp)"></a>SMTP: Sending E-Mail</h3><p><div class="SIntrapara"><table cellspacing="0" cellpadding="0" class="defmodule"><tr><td align="left"><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=require.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._require%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">require</a></span><span class="stt"> </span><a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">net/smtp</span></a><span class="RktPn">)</span></td><td align="right"><span class="RpackageSpec"><span class="Smaller"> package:</span> <span class="stt">net-lib</span></span></td></tr></table></div><div class="SIntrapara">The <a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">net/smtp</span></a> module provides
tools for sending electronic mail messages using SMTP. The client must
provide the address of an SMTP server; in contrast, the
<a href="sendmail.html" class="RktModLink" data-pltdoc="x"><span class="RktSym">net/sendmail</span></a> module uses a pre-configured
<span class="stt">sendmail</span> on the local system.</div></p><p>The <a href="head.html" class="RktModLink" data-pltdoc="x"><span class="RktSym">net/head</span></a> library defines the format of a
<a href="head.html#%28tech._header%29" class="techoutside" data-pltdoc="x"><span class="techinside">header</span></a> string, which is used by <span class="RktSym">send-smtp-message</span>. The
<a href="head.html" class="RktModLink" data-pltdoc="x"><span class="RktSym">net/head</span></a> module also provides utilities to verify the
formatting of a mail address. The procedures of the <span class="RktSym">net/smtp</span>
module assume that the given string arguments are well-formed.</p><h4 x-source-module="(lib "net/scribblings/net.scrbl")" x-part-tag=""SMTP_Functions"">7.1<tt> </tt><a name="(part._.S.M.T.P_.Functions)"></a>SMTP Functions</h4><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><table cellspacing="0" cellpadding="0" class="prototype RForeground"><tr><td><span class="RktPn">(</span><a name="(def._((lib._net/smtp..rkt)._smtp-send-message))"></a><span title="Provided from: net/smtp | Package: net-lib"><span class="RktSym"><a href="#%28def._%28%28lib._net%2Fsmtp..rkt%29._smtp-send-message%29%29" class="RktValDef RktValLink" data-pltdoc="x">smtp-send-message</a></span></span></td><td><span class="hspace"> </span></td><td><span class="RktVar">server-address</span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="RktVar">from</span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="RktVar">to</span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="RktVar">header</span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="RktVar">message</span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span>[</td><td><span class="RktPn">#:port-no</span><span class="hspace"> </span><span class="RktVar">port-no/k</span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="RktPn">#:auth-user</span><span class="hspace"> </span><span class="RktVar">user</span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="RktPn">#:auth-passwd</span><span class="hspace"> </span><span class="RktVar">pw</span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="RktPn">#:tcp-connect</span><span class="hspace"> </span><span class="RktVar">connect</span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="RktPn">#:tls-encode</span><span class="hspace"> </span><span class="RktVar">encode</span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="RktVar">port-no</span>]<span class="RktPn">)</span></td><td><span class="hspace"> </span></td><td>→</td><td><span class="hspace"> </span></td><td><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=void.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._void%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">void?</a></span></td></tr></table></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">server-address</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">string?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">from</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">string?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">to</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._listof%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">listof</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">string?</a></span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">header</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">string?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">message</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._listof%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">listof</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._or%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">or/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">string?</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=bytestrings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._bytes%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">bytes?</a></span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">port-no/k</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._integer-in%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">integer-in</a></span><span class="hspace"> </span><span class="RktVal">0</span><span class="hspace"> </span><span class="RktVal">65535</span><span class="RktPn">)</span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVal">25</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">user</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._or%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">or/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">string?</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._false%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">false/c</a></span><span class="RktPn">)</span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVal">#f</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">pw</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._or%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">or/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">string?</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._false%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">false/c</a></span><span class="RktPn">)</span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVal">#f</span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td><span class="hspace"> </span></td><td><span class="RktVar">connect</span></td><td><span class="hspace"> </span></td><td>:</td><td><span class="hspace"> </span></td><td><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><span class="RktPn">(</span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">string?</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._integer-in%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">integer-in</a></span><span class="hspace"> </span><span class="RktVal">0</span><span class="hspace"> </span><span class="RktVal">65535</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">. </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%252A%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span>*</a></span><span class="RktPn"> .</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=port-ops.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._input-port%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">input-port?</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=port-ops.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._output-port%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">output-port?</a></span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr></table></td><td><span class="hspace"> </span></td><td>=</td><td><span class="hspace"> </span></td><td><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=tcp.html%23%2528def._%2528%2528lib._racket%252Ftcp..rkt%2529._tcp-connect%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">tcp-connect</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td><span class="hspace"> </span></td><td><span class="RktVar">encode</span></td><td><span class="hspace"> </span></td><td>:</td><td><span class="hspace"> </span></td><td><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._or%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">or/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._false%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">false/c</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">(</span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=port-ops.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._input-port%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">input-port?</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=port-ops.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._output-port%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">output-port?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">#:mode</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._one-of%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">one-of/c</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">connect</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">#:encrypt</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._one-of%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">one-of/c</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">tls</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">#:close-original?</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._one-of%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">one-of/c</a></span><span class="hspace"> </span><span class="RktVal">#t</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">. </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%252A%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span>*</a></span><span class="RktPn"> .</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=port-ops.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._input-port%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">input-port?</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=port-ops.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._output-port%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">output-port?</a></span><span class="RktPn">)</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr></table></td><td><span class="hspace"> </span></td><td>=</td><td><span class="hspace"> </span></td><td><span class="RktVal">#f</span></td></tr></table></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">port-no</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._integer-in%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">integer-in</a></span><span class="hspace"> </span><span class="RktVal">0</span><span class="hspace"> </span><span class="RktVal">65535</span><span class="RktPn">)</span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVar">port-no/k</span></td></tr></table></blockquote></div><div class="SIntrapara">Connects to the server at <span class="RktVar">server-address</span> and <span class="RktVar">port-no</span>
to send a message. The <span class="RktVar">from</span> argument specifies the mail
address of the sender, and <span class="RktVar">to</span> is a list of recipient
addresses (including “To:”, “CC”, and “BCC” recipients).</div></p><p>The <span class="RktVar">header</span> argument is the complete message header, which
should already include “From:”, “To:”, and “CC:” fields
consistent with the given sender and recipients. See also the
<a href="head.html" class="RktModLink" data-pltdoc="x"><span class="RktSym">net/head</span></a> library for header-creating utilities.</p><p>The <span class="RktVar">message</span> argument is the body of the message, where each
string or byte string in the list corresponds to a single line of
message text. No string in <span class="RktVar">message</span> should contain a carriage
return or linefeed character.</p><p>The optional <span class="RktVar">port-no</span> argument—<wbr></wbr>which can be specified either
with the <span class="RktPn">#:port-no</span> keyword or, for backward compatibility, as
an extra argument after keywords—<wbr></wbr>specifies the IP port to use in
contacting the SMTP server.</p><p>The optional <span class="RktPn">#:auth-user</span> and <span class="RktPn">#:auth-passwd</span> keyword
argument supply a username and password for authenticated SMTP (using
the AUTH PLAIN protocol).</p><p>The optional <span class="RktPn">#:tcp-connect</span> keyword argument supplies a
connection procedure to be used in place of <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=tcp.html%23%2528def._%2528%2528lib._racket%252Ftcp..rkt%2529._tcp-connect%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">tcp-connect</a></span>. For
example, use <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=openssl&rel=index.html%23%2528def._%2528%2528lib._openssl%252Fmain..rkt%2529._ssl-connect%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">ssl-connect</a></span> to connect to the server via SSL.</p><p>If the optional <span class="RktPn">#:tls-encode</span> keyword argument supplies a
procedure instead of #f, then the ESMTP STARTTLS protocol is used to
initiate SSL communication with the server. The procedure given as the
#:tls-encode argument should be like <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=openssl&rel=index.html%23%2528def._%2528%2528lib._openssl%252Fmain..rkt%2529._ports-%7E3essl-ports%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">ports->ssl-ports</a></span>; it
will be called as</p><blockquote class="SCodeFlow"><p><span class="RktPn">(</span><span class="RktVar">encode</span><span class="hspace"> </span><span class="RktSym">r</span><span class="hspace"> </span><span class="RktSym">w</span><span class="hspace"> </span><span class="RktPn">#:mode</span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">connect</span><span class="hspace"> </span><span class="RktPn">#:encrypt</span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">tls</span><span class="hspace"> </span><span class="RktPn">#:close-original?</span><span class="hspace"> </span><span class="RktVal">#t</span><span class="RktPn">)</span></p></blockquote><p>and it should return two values: an input port and an export port.
All further SMTP communication uses the returned ports.</p><p>For encrypted communication, normally either <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=openssl&rel=index.html%23%2528def._%2528%2528lib._openssl%252Fmain..rkt%2529._ssl-connect%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">ssl-connect</a></span>
should be supplied for <span class="RktPn">#:tcp-connect</span>, or
<span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=openssl&rel=index.html%23%2528def._%2528%2528lib._openssl%252Fmain..rkt%2529._ports-%7E3essl-ports%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">ports->ssl-ports</a></span> should be supplied for
<span class="RktPn">#:tls-encode</span>—<wbr></wbr>one or the other (depending on what the server
expects), rather than both.</p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>parameter</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._net/smtp..rkt)._smtp-sending-end-of-message))"></a><span title="Provided from: net/smtp | Package: net-lib"><span class="RktSym"><a href="#%28def._%28%28lib._net%2Fsmtp..rkt%29._smtp-sending-end-of-message%29%29" class="RktValDef RktValLink" data-pltdoc="x">smtp-sending-end-of-message</a></span></span><span class="RktPn"></span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">any</a></span><span class="RktPn">)</span></p></blockquote></td></tr><tr><td><span class="RktPn">(</span><span title="Provided from: net/smtp | Package: net-lib"><span class="RktSym"><a href="#%28def._%28%28lib._net%2Fsmtp..rkt%29._smtp-sending-end-of-message%29%29" class="RktValDef RktValLink" data-pltdoc="x">smtp-sending-end-of-message</a></span></span><span class="hspace"> </span><span class="RktVar">proc</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=void.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._void%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">void?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">proc</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">any</a></span><span class="RktPn">)</span></td></tr></table></blockquote></div><div class="SIntrapara">A parameter that determines a send-done procedure to be called after
<span class="RktSym"><a href="#%28def._%28%28lib._net%2Fsmtp..rkt%29._smtp-send-message%29%29" class="RktValLink" data-pltdoc="x">smtp-send-message</a></span> has completely sent the message. Before the
send-done procedure is called, breaking the thread that is executing
<span class="RktSym"><a href="#%28def._%28%28lib._net%2Fsmtp..rkt%29._smtp-send-message%29%29" class="RktValLink" data-pltdoc="x">smtp-send-message</a></span> cancels the send. After the send-done
procedure is called, breaking may or may not cancel the send (and
probably will not).</div></p><h4 x-source-module="(lib "net/scribblings/net.scrbl")" x-part-tag=""SMTP_Unit"">7.2<tt> </tt><a name="(part._.S.M.T.P_.Unit)"></a><a name="(mod-path._net/smtp-unit)"></a>SMTP Unit</h4><blockquote class="refpara"><blockquote class="refcolumn"><blockquote class="refcontent"><p><span class="RktSym"><a href="#%28def._%28%28lib._net%2Fsmtp-unit..rkt%29._smtp~40%29%29" class="RktValLink" data-pltdoc="x">smtp@</a></span> and <span class="RktSym"><a href="#%28form._%28%28lib._net%2Fsmtp-sig..rkt%29._smtp~5e%29%29" class="RktStxLink" data-pltdoc="x">smtp^</a></span> are deprecated.
They exist for backward-compatibility and will likely be removed in
the future. New code should use the <a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">net/smtp</span></a> module.</p></blockquote></blockquote></blockquote><p><table cellspacing="0" cellpadding="0" class="defmodule"><tr><td align="left"><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=require.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._require%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">require</a></span><span class="stt"> </span><a href="#%28mod-path._net%2Fsmtp-unit%29" class="RktModLink" data-pltdoc="x"><span class="RktSym">net/smtp-unit</span></a><span class="RktPn">)</span></td><td align="right"><span class="RpackageSpec"><span class="Smaller"> package:</span> <span class="stt">compatibility-lib</span></span></td></tr></table></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>value</p></div></div><p class="RForeground"><a name="(def._((lib._net/smtp-unit..rkt)._smtp~40))"></a><span title="Provided from: net/smtp-unit | Package: compatibility-lib"><span class="RktSym"><a href="#%28def._%28%28lib._net%2Fsmtp-unit..rkt%29._smtp~40%29%29" class="RktValDef RktValLink" data-pltdoc="x">smtp@</a></span></span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym">unit?</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Imports nothing, exports <span class="RktSym"><a href="#%28form._%28%28lib._net%2Fsmtp-sig..rkt%29._smtp~5e%29%29" class="RktStxLink" data-pltdoc="x">smtp^</a></span>.</div></p><h4 x-source-module="(lib "net/scribblings/net.scrbl")" x-part-tag=""SMTP_Signature"">7.3<tt> </tt><a name="(part._.S.M.T.P_.Signature)"></a><a name="(mod-path._net/smtp-sig)"></a>SMTP Signature</h4><p><table cellspacing="0" cellpadding="0" class="defmodule"><tr><td align="left"><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=require.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._require%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">require</a></span><span class="stt"> </span><a href="#%28mod-path._net%2Fsmtp-sig%29" class="RktModLink" data-pltdoc="x"><span class="RktSym">net/smtp-sig</span></a><span class="RktPn">)</span></td><td align="right"><span class="RpackageSpec"><span class="Smaller"> package:</span> <span class="stt">compatibility-lib</span></span></td></tr></table></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>signature</p></div></div><p class="RForeground"><a name="(form._((lib._net/smtp-sig..rkt)._smtp~5e))"></a><span title="Provided from: net/smtp-sig | Package: compatibility-lib"><span class="RktSym"><a href="#%28form._%28%28lib._net%2Fsmtp-sig..rkt%29._smtp~5e%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">smtp^</a></span></span><span class="hspace"> </span>:<span class="hspace"> </span>signature</p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara"><blockquote class="leftindent"></blockquote></div></p><p>Includes everything exported by the <a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">net/smtp</span></a> module.</p><div class="navsetbottom"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, "6.1", "../");" onfocus="this.style.color="black"; this.style.textAlign="left"; if (this.value == "...search manuals...") this.value="";" onblur="if (this.value.match(/^ *$/)) { this.style.color="#888"; this.style.textAlign="center"; this.value="...search manuals..."; }"/></form> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.1");">top</a></span><span class="navright"> <a href="sendurl.html" title="backward to "6 Send URL: Opening a Web Browser"" data-pltdoc="x">← prev</a> <a href="index.html" title="up to "Net: Networking Libraries"" data-pltdoc="x">up</a> <a href="sendmail.html" title="forward to "8 sendmail: Sending E-Mail"" data-pltdoc="x">next →</a></span> </div></div></div><div id="contextindicator"> </div></body></html>
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