I've been moving webmail over from Bytemark to Mythic Beasts, and it's nearly ready, the only remaining problem is that the Spsmassassin integration in using (spamass-milter) isn't correctly picking up the name for the destination mailbox.

I think that the problem is that it runs to early in the processing pipeline, before postfix has done the alias lookup Allegedly, it can lookup aliases at process time but it doesn't seem to be doing that.

The alternative is to use spampd, a wrapper around SA that acts as an LMTP proxy, and is therefore well past alias translation.

Of course, there's still a problem! spampd doesn't use SA's per user preferences. I hacked the previous version to do so, but the author rejected my patch as they'd just done a rewrite. Find to see how much work it's going to be to fix it, I guess