On 4 Jun 2019, at 8:00, Edouard Guigné wrote:

Does reject_unauthenticated_sender_login_mismatch can help in this case ?

None of the Postfix *_sender_* restrictions act on the contents of message headers. They act on the SMTP envelope sender address, which in this case is NOT the same address as the From header.

--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)

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