port 25 connection refused - Zimbra Forums
https://forums.zimbra.org/viewtopic.php?t=1568513.09.2014 · port 25 connection refused. Postby yas13899 » Mon Mar 31, 2014 12:08 am. I already checked it with many blacklisting services but none of them give a negative result.. In fact the above problem occurs not only for gmail or yahoo (I gave these just as a sample) but with all outgoing email to any destination (except for the same domain addresses ...