Have SS manually filter already downloaded messages in inbox?

Occasionally SpamSieve isn’t launched when Airmail gets launched, at which point a bunch of spam makes it through to my inbox.

Is there a way, at that point, to have SpamSieve go through what’s already IN the inbox?

As far as I can tell, it will only check when new mail is downloaded…why not have a way to check already downloaded mail against the blacklist?

Please check for errors in the Console that might explain why Airmail is unable to launch SpamSieve.

Unfortunately, unlike most other mail programs, Airmail does not have that feature built in. I am looking into whether it is possible to add it via a plug-in.