I am running opensuse 13.2 . I am not sure exactly when the problem started. Any smtp connect takes a unusually long time. When I start Thunderbird there is a long wait before the new mail appears.
Also I have a ruby program that sends mail using the net/smtp and mail gems. It used to work fine. Now using mail defaults it times out on connect start. The default timeout is 30 seconds. If I set it to 200 seconds I get a connection and can send mail. I have not tried to find the minimum timeout necessary. This happens connecting to comcast and gmail. gmail is 2 factor but comcast is not.