[bitfolk] Broken Courier SSL after upgrade from stretch and crossgrade to AMD64

Hello All, Throwing this problem out into the wild to see if anyone has any ideas - already had some help from Andy re-crossgrading so trying not to bother him with all my woes. I've upgraded to Buster from Stretch (yep, I know I'm lagging). Courier seems to have decided to be my SMTP server instead of Exim and I can't get any connections to either IMAP, IMAP-SSL or SMTP from the rest of the world. Asfar as I can see courier is running and should be trying to do IMAP type things. Courier doesn't seem to log to its own logfiles, so what it is doing is being logged to syslog along with a mess of other stuff. Neither thunderbird or apple mail give me anything useful on the attempt to connect. Just that the connection failed. Does anyone have any good ideas? (Note to self - go back in time about 4 years and document your mail-server) cheers, David If man has no tea in him, he is incapable of understanding truth and beauty. ~Japanese Proverb Find yourself a cup of tea; the teapot is behind you. Now tell me about hundreds of things. ~Saki