Still not working
I contacted my ISP and they spent over an hour on the phone with me checking connections, changing setting and setting up a new SMTP server with a new email address. Nothing worked!
So it's still not working even with my ISP's outgoing server.
At one point I managed to send one email using their SMTP server but when we tried again it didn't work.
They seem to think it's a problem with Mail itself, and I'm starting to think so too. This problem only started a short time ago and has coincided with me upgrading to 10.4.6. Are there any known issues with 10.4.6?
Any other ideas?
This is really pissing me off now