Sporadic TLS/STARTTLS negotitation failed

Andrew Nichols andrew-lists at quadrant.net
Wed Mar 7 11:00:35 EST 2018


We run a cyrus-imap 2.5.11 server under FreeBSD and we are experiencing issues with TLS/STARTTLS negotiation failed entries in the log, which show as timeouts on the client side.   It’s all different email clients and even our monitoring experiencing these failures.  Other TLS services (https mostly) on the same server do not have these failures.  There are also times when these errors ramp up and happen to most TLS clients, which is only solved by restarting cyrus.    Has anyone else experiences these issues or have any tips on where to look to figure out the root cause?


Andrew Nichols
Quadrant Newmedia
support at quadrant.net

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