Can't send email with mail.app or MozT-Bird
Things that we have tried thus far;
Changing server port number.
Trying to use the ISP to send email.
Resetting the router.
Trying a different router port.
Bypassing the router.
Running traceroute (I never reach either the webhost or ISP for sending email).
Permissions fix.
Tried AppleJack, Onyx, etc. Nadda.
Firewall on, and firewall off.
Trying a different email program (thus I now know mail.app and MozT-Bird don't work).
Tried a new user, again nadda.
I'm sure I'm forgetting a few things we've tried over the past few months, but you get the idea.
I'm now at my wits end. I really need to send email. I really want to dump the Windows boxes. But I can't until I get this issue resolved.
Please, please help me.
iBook G3, Mac OS X (10.4.4)