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Sender address rejected: not owned by user

This error is caused by Postfix setting:

smtpd_recipient_restrictions =

It will reject the request when $smtpd_sender_login_maps specifies an owner for the MAIL FROM address, but the client is not (SASL) logged in as that MAIL FROM address owner; or when the client is (SASL) logged in, but the client login name doesn't own the MAIL FROM address according to $smtpd_sender_login_maps.

Remove reject_sender_login_mismatch in Postfix config file (/etc/postfix/ and restart Postfix can fix it.


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