I have recently some issues with people using my email server.
They have problems with synchronizing folders on outlook, and I can't figure out what to do.
I found somewhere that I could extend a setting for imap connections:
mail_max_userip_connections = 20
which didn't really help, I was thinking about extending timeout of connection or something, but really can find anything like that.
In Thunderbird it seems to be OK.
here is dovecot -p result:
if anything could help please let me know what should provide.