I just installed MailCow and I’m trying to move all notification services previously using GMail to MailCow.

One feature of GMail I like, not present out of the box in mailcow, is the the fact that, after authentication from user@gmail.com, their SMTP sever implementation accept email with any sender address, and rewrite sender to user@gmail.com if needed.

This could be useful sometimes, if the service trying to send email doesn’t allow to easily set the sender address.

Mailcow, on the other hand, reject the mail if the sender is not an alias of the mailbox account.

It is possible to configure mailcow/postfix so that, instead of rejecting, rewrite the sender address if the sender address is not a mailbox alias/extension?

  • EETNyx

      Moolevel 47
    • Post #2

    From top of my head edit mailbox find “Allow to send as” there should by option Disable check and this should be there multiple times using different settings. In case of rewriting there is Address rewriting tab look there

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      ETNyx Yes, I remember this setting too, but I shoud try, because I think the domain is still checked, and unfortunately my service try to send email not only from a non-existant address but also from a wron mail domain.

        • EETNyx

            Moolevel 47
          • Post #4

          Try it, as I wrote before there should by multiple chooses to allow *.domain.ltd for every listed domains in MC and also . to pass all emails,…

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