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Re: [Nmh-workers] Call for testing of nmh 1.7 release candidate 3

From: Ralph Corderoy
Subject: Re: [Nmh-workers] Call for testing of nmh 1.7 release candidate 3
Date: Fri, 25 Aug 2017 19:06:41 +0100

Hi Anthony,

> > It looks like you got bit by this change in 1.7, Anthony:
> >
> > - post now defaults to port 587 on 'smtp' message submission.
> Thanks. Since the relay only accepts connections from localhost, I was
> okay with adding "send: -port 25 -notls"

In case, like me, you wondered why the switch, it seems port 25 is now
for SMTP between MTAs, mail transfer agents, and port 587 is for SMTP to
an MSA, mail submission agent, from an MUA, mail user agent, like nmh.
It's typically the same program, e.g. postfix, wearing two different
hats, but it allows 587 to only be localhost, say, and for Postfix to be
configured to do different things to those emails, e.g. fix up headers,
compared with 25 where it might take violation of the standards as a
cause to reject.

There's a mention of this, amongst many other things, in the NEWS file.

Cheers, Ralph.

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