Hi,Running Jessie, postfix/courier on my VPS. I don't often need to restart, which is just as well, as after a reboot, I'm unable to access mail over IMAP.
It turns out, that if I run service courier-imap-ssl restart and/or service courier-imap restart, mail functionality is restored.
Does anyone have any suggestions as to where to look for a fix to this problem, please?