Apple Mail+Airport

[Rod Clifford]

I have seen coments on Apple's discussion boards regarding the last 
upgrade to 10.2.8-
several people were having difficulty sending mail. Never read any 
solutions though.
I cannot send (but can receive). Also, under prefs/options there is a 
port number window.
Outgoing shows port 25, but incoming indicates port 110. Tried port 
#110 as outgoing but no luck.
Is this an airpot problem or 10.2.8?
Thanks in advance, Rod