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: http://snipt.org/AAig5 if anything could help please let me know what should provide.