[SOLVED] 450 4.7.1 <>: Helo command rejected: Host not found; proto=SMTP helo=<>

Error added: 2016-05-27T11:39:34Z

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Answer 2391 (100.0% helpful)

I had to disable the check in Postfix that rejected EHLO with unknown hosts (smtpd_helo_restrictions = reject_unknown_helo_hostname) while I set up the account in Icedove.

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