I mainly use Postbox with Spamsieve but I also setup Airmail 3 some time ago (at the time I considered it an alternative backup for Postbox) and use it with some “junk” accounts that I check infrequently. Spamsieve works on most of the Airmail accounts but today I noticed that one of the accounts keeps getting the same spam in the inbox even when I choose Mark as Spam for those messages. I checked the Airmail/Spamsieve setup and it only mentions Imap accounts. This account is POP (for reasons I can’t recall).
Does Spamsieve work with Airmail POP accounts?