I've posted this question some days ago, 554 5.7.1 You are not allowed to connect. sending from postfix
Based on the answer I've sent some emails to the admin of the other email server, unfortunately seems that the guy does not know what to check, and he didn't manage to sort out the problem, is there anything I can do from my side to workaround this problem? I've read that maybe using gmail smtp could be an option, but I'm wondering if this relaying will work or my server will be banned by google for misused.
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