I'm having trouble to open ports on our wireless firewall for Mac Os mail user.
When I open all services, it works, but doesn't when I open only 80, 143, 587. No SSL is required. I checked the Mail preference in Mac Os Mail, those are the ports shown at exchange setup required. What else do I have to open?
Did you open port 25 for SMTP or 110 for POP mail?
If you open a Terminal window and type
Open in new windowThis will show you all the ports which are in use... in there you'll see Mail and you can see what ports it has open.