Hi. I created a mailcow server with the default settings 11 days ago (just changed the SMTP ports). I have been testing for a few days. Everything was working. But now my server stopped receiving mail. I am trying to send mail from gmail to my mailcow mailbox. But they don’t come. gmail doesn’t send notifications about unsuccessful delivery. There is no record in postfix logs when I send mail from gmail.
I could try reloading the containers, but I want to use this example to understand the cause and how to diagnose this kind of problem.
Can you please tell me what could be the reason, how to identify the cause?
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Mail sending works at the same time