[expert] Email Setup with Cablemodem Account - How To?

[Sevatio Octavio]

I'm helping someone kick the M$ habit but I'm stuck with AT&T's Cablemodem email 
setup.  Looking at IE Owchluk-Xpress, it has the
POP3 and SMTP set as "mail".  How do they get away with just "mail"?  So if I wanted 
to use Kmail instead, what would I put down for
POP3 & SMTP servers?  .... mail.home.com doesn't work and I can't get through to their 
crappy support center.

Seve