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@mahan.org>: Recipient address rejected: unverified address: host ns.mahan.org[private/dovecot-lmtp] said: 550 5.1.1 mahan@mahan.org User doesn't exist: mahan@mahan.org (in reply to RCPT TO command); from=< pmahan@silver-peak.com> to=mahan@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