I feel maybe that’s a dovecot issue? Or a spamassassin issue?
In my setup it seems “normal” that spam sent to aliases gets in the “catch all” instead of the mailbox of the user that has that alias. Very infuriating as I had to tune down the spam filter to block only the most obvious spam as false positives get “lost”
Although since 3-4 months ago I didn’t receive any misdirected spam in the catch-all mailbox, so it might be that’s now it has been fixed (I’m one of those guys that run updates automatically unattended because my hobby is fixing problems when there’s a breaking feature after update)
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I haven’t tried it personally, but Mox looks like a nice modern mailserver. It might do what you want.
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You might find this project interesting:
https://maddy.email/
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https://mailu.io
Mailcow allows users to setup their own aliases similar to gmail with a “+” delimiter. E.g. username+randomalias@domain.com.
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Insert logs in pastebin.com and attach links and you can open ticket on git.
I feel maybe that’s a dovecot issue? Or a spamassassin issue?
In my setup it seems “normal” that spam sent to aliases gets in the “catch all” instead of the mailbox of the user that has that alias. Very infuriating as I had to tune down the spam filter to block only the most obvious spam as false positives get “lost”
Although since 3-4 months ago I didn’t receive any misdirected spam in the catch-all mailbox, so it might be that’s now it has been fixed (I’m one of those guys that run updates automatically unattended because my hobby is fixing problems when there’s a breaking feature after update)
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You can use postfix + dovecot + roundcube + spamassassin + opendkim + pigeonhole. Maximum stability. Roundcube have aliases plugin.
You can start from here: https://wiki.archlinux.org/title/Virtual_user_mail_system_with_Postfix,_Dovecot_and_Roundcube
I don’t selfhost mail but I heard of stalwart
not sure if this fits your usecase, but nixos-mailserver