Running current version of SpamSieve as a drone on a circa 2011 Mac Mini (MacOS 10.13.2).
From time to time I see an error message from SpamSieve that contains the text “Message does not exist”. (It’s a long message in a modal dialog.) The modal dialog stops SpamSieve, as far as I can tell, since I start seeing spam messages in my InBox on my other machines. After I log into the drone and click through the dialog (“OK”), it appears that Mail and/or SpamSieve are in an unknown state - spam messages do not appear to get processed. Quitting and re-starting Mail (and, therefore, SpamSieve) works fine, but Mail and/or SpamSieve still seem to be confused - spam messages not processed. After a reboot of the drone machine, things work fine.
I believe that I may be the one stimulating the “message does not exist” message by accessing and deleting a message that SpamSieve is trying to process - when doing so I’m on another machine (iPhone, laptop, etc.).
Would appreciate any guidance you can offer on how I can/should deal with this. I travel a lot, and having the drone unstable in this manner is a concern for me and my family.