mail not dowloaded from server

I started using SpanSieve with Apple Mail a couple weeks ago, and it was working great. Today all of the sudden I’m getting lots of duplicated Spam messages that all say “message has not been downloaded from the server. You need to take this account online in order to download it.” Both accounts are online, so I’m not sure why I’m getting this. Also it seems a lot more Spam message are getting through than ususal.

Any ideas?

I don’t think this has anything to do with SpamSieve. Please see what Apple has to say about that error message (which is rather misleading).

In order to help you with this and see whether the problem is with SpamSieve or your setup, I’ll need you to report the spam messages that are getting through.