/etc/nmh/scan.MMDDYY is in nmh 1.6-16.
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 | %; scan.MMDDYY
%;
%; Like scan.default, but the date is printed in MM/DD/YY format rather than
%; MM/DD.
%;
%4(msg)%<(cur)+%| %>%<{replied}-%?{encrypted}E%| %>\
%02(mon{date})/%02(mday{date})/%(void(year{date}))%02(modulo 100)%<{date} %|*%>\
%<(mymbox{from})%<{to}To:%14(decode(friendly{to}))%>%>\
%<(zero)%17(decode(friendly{from}))%> \
%(decode{subject})%<{body}<<%{body}>>%>
|