Using lmtp to authenticate email users

[Patrick Mahan]

Hmm, actually it is set -

root at ns:/usr/local/etc/dovecot # dovecot -a | grep auth_username_format
auth_username_format = %Ln

Oddly, it now seems to work once I made this change -

root at ns:/usr/local/etc/dovecot # dovecot -a | grep -A5 "protocol lmtp"
protocol lmtp {
  # Added explicit hostname
  hostname = ns.mahan.org
  mail_fsync = optimized
  mail_plugins = " sieve"
}

I now see -

root at ns:/usr/local/etc/dovecot # tail -f /var/log/maillog | grep "
mahan at mahan.org"
Mar 31 08:54:47 ns postfix/lmtp[74403]: 7871EA2DFB5: to=<mahan at mahan.org>,
relay=ns.mahan.org[private/dovecot-lmtp], delay=1.9,
delays=1.8/0.01/0.01/0.01, dsn=2.0.0, status=sent (250 2.0.0 <
mahan at mahan.org> t1FFEMfioFykIgEAYVf4yg Saved)

So I guess it is working? :-)

Thanks,

Patrick


On Sun, Mar 31, 2019 at 7:56 AM Aki Tuomi via dovecot <dovecot at dovecot.org>
wrote:

>
> On 31 March 2019 17:41 Jerry via dovecot < dovecot at dovecot.org> wrote:
>
>
> On Thu, 28 Mar 2019 05:22:37 -0700, Patrick Mahan via dovecot stated:
>
> >FreeBSD 11.2
> >Postfix 3.3.2
> >Dovecot 2.3.4
> >
> >I am trying to use dovecot lmtp with postfix to verify authentication
> >of incoming email and to avoid being a spam relay (an issue I was
> >having using sendmail as my MTA).
> >
> >I am getting the following log message in /var/log/maillog:
> >
> >Mar 30 20:31:38 ns postfix/smtpd[40373]: NOQUEUE: reject: RCPT from
> >mail-eopbgr750091.outbound.protection.outlook.com[40.107.75.91]: 450
> >4.1.1 < mahan at mahan.org>: Recipient address rejected: unverified
> >address: host ns.mahan.org[private/dovecot-lmtp] said: 550 5.1.1
> >< mahan at mahan.org> User doesn't exist: mahan at mahan.org (in reply to
> >RCPT TO command); from=< pmahan at silver-peak.com> to=< mahan at mahan.org>
> >proto=ESMTP helo=< NAM02-BL2-obe.outbound.protection.outlook.com>
> >
> >'mahan' does exist on ns.mahan.org. So I am confused to why lmtp is
> >failing to find this username.
> >
> >Thanks,
> >
> >Patrick
> >
>
> You probably shuld be asking this on the Postfix forum. Have you read
> < ">http://www.postfix.org/ADDRESS_VERIFICATION_README.html>
> <http://www.postfix.org/ADDRESS_VERIFICATION_README.html%3E>? You also
> have "smtpd_reject_unlisted_recipient" options. You really need to post
> the output of "postconf -nf" and perhaps "postconf -Mf".
>
> --
> Jerry
>
>
> I would try setting
>
> auth_username_format=%Ln
>
> as otherwise domain part is included in username lookup...
>
> ---
> Aki Tuomi
>
>
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