/usr/share/doc/qmail/PIC.nullclient is in qmail 1.06-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | Original message:
To: bill@irs.gov
Hi.
qmail-inject Fill in the complete envelope and header:
| (envelope) from joe@heaven.af.mil to bill@irs.gov
| From: joe@heaven.af.mil
| To: bill@irs.gov
|
| Hi.
V
qmail-queue Store message safely on disk.
Trigger qmail-send.
|
V
qmail-send Look at envelope recipient, bill@irs.gov.
| Is irs.gov in locals? No.
| Is bill@irs.gov in virtualdomains? No.
| Is irs.gov in virtualdomains? No.
| Is .gov in virtualdomains? No.
| Deliver remotely to bill@irs.gov.
V
qmail-rspawn Run qmail-remote.
|
V
qmail-remote Look at host name, irs.gov.
Is irs.gov listed in smtproutes? Yes: ":bigbang.af.mil".
Look up DNS A for bigbang.af.mil and connect by SMTP:
MAIL FROM:<joe@heaven.af.mil>
RCPT TO:<bill@irs.gov>
|