On Mon, Nov 28, 2016 at 04:13:45PM +0000, Tony van der Hoff wrote: > Hi, > > On my jessie-powered VPS I'm handling mail with Postfix and cyrus-imap-ssl. > > From time to time, I find I'm unable to send mail from my Thunderbird MUA > due to my credentials being rejected. this may happen multiple times per > day, or only once weekly. > > Restarting the cyrus-imap-ssl daemon on the server always resolves the > issue, but, of course, is inconvenient. I can find no log records suggesting > what’s happening, but then I don't really know where to look, or what to > look for. > > The mail server has very low traffic, and only 3 users. > > Can anyone please suggest a way forward to resolve this issue? >
Log file? Exact error message? Sending is not an imap issue. So you might want look into the MTA (in your case Postfix). -H -- Henning Follmann | hfollm...@itcfollmann.com
