Apple Event: May 7th at 7 am PT
So I have my ISP confirm port 25 is open I have my server on DMZ and also to be extra sure port 25 open specifically to it and yes it works fine but why on earth does my mac server tell me that it cannot access port 25 when there is no firewall blocking it its prevcenting the sending and recieving of mail because there my mac just isnt listening on it.
There is also MX records so these are fine too.
Mac mini (Late 2012), OS X Mavericks (10.9), Mavericks Server
In that case, nothing is listening on port 25. Either the MTA isn't running at all, or it's configured not to listen on that port.
matt here is the output you should see from the lsof command.
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
master 2951 root 12u IPv4 0xdaecbf9404770f79 0t0 TCP *:smtp (LISTEN)
you could also try sudo lsof -i4 | grep smtp
Also check out this document from apple to verify that apple mail server is using port 25.
Port 25 issue
