Manual Reference Pages - OFMIPD (8)
ofmipd - accept outgoing mail through OFMIP
ofmipd accepts mail messages through the
Old-Fashioned Mail Injection Protocol (OFMIP),
rewrites them according to local rules,
qmail-queue to deposit them into the outgoing queue.
ofmipd must be supplied several environment variables;
http://pobox.com/~djb/proto/ofmip.html for further information on OFMIP.
You can use
tcpserver to set up
ofmipd on a free TCP port.
Some sites use port 26.
Some sites use port 25 on an IP address that does not receive incoming mail.
ofmipd will relay messages to any destination.
It should be invoked
only for connections from preauthorized users.
tcpserver you can deny connections
that do not come from preauthorized IP addresses such as 127.0.0.1.
Most MUAs that claim to be SMTP clients
are actually OFMIP clients.
You should point them at
ofmipd rather than
qmail-smtpd. Some MUAs will use port 26 of
server if you tell them that the SMTP server is
ofmipd rewrites each message in essentially the same way that
It transforms each envelope address
as discussed in
it cleans up address lists in
Mail-Followup-To; it adds
Message-ID; it discards
Return-Path; and it moves various fields to the top of the message.
ofmipd also transforms envelope sender addresses and
From lines according to
name.cdb is supplied.
for further details.
ofmipd accepts LF and CR LF as line terminators inside messages.
ofmipd does not do hop counting
or local-IP-address recognition.
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