said by W4RP3D :

Hi MTX !

I'm working for Bell Sympatico Tech Support...

You probably have been upgraded to the new platform..
if you're using outlook express...

Set up your account like this :
incoming mail : pophm.sympatico.ca
outgoing mail : smtphm.sympatico.ca

Toggle on the option "My outgoing server requires authentication" , and click Settings. Toggle on : Log on using... and enter your complete email address and password and click ok.

Then change the username for your complete email address and password.

Then click server and toggle on the two squares: My server requires a secure connexion (ssl) and put the Server TimeOuts to the maximum!

You should be fixed with this.