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I've set up mail server with iRedMail. It should act as an SMTP server for web app. Postfix is restricted only for localhost usage.

Let's assume that I create an account web@example.com.

What I need is to allow set arbitrary from header, e.g. bar@example.com, or even baz@my-second-domain.com

Currently this is rejecting:

postfix/smtpd[7386]: NOQUEUE: reject: RCPT from ***[127.0.0.1]: 550 5.1.0 <notlviv@pb.org.ua>: Sender address rejected: User unknown in virtual mailbox table; from=<notlviv@pb.org.ua> to=<some@email.com> proto=ESMTP helo=<[127.0.0.1]>

How can this be allowed?

Terion
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1 Answers1

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Ok, figured out:

smtpd_reject_unlisted_sender = yes # set to no
# Sender restrictions
smtpd_sender_restrictions =
    reject_unknown_sender_domain
    reject_non_fqdn_sender
    reject_unlisted_sender # comment this
Terion
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