You can check on the gmail site - some email services are able to be imported into a gmail account:
Importing contacts and mailPrint
If you're switching to Gmail from another email provider, importing contacts and messages from your old email account can help you make the transition without having to do a bunch of housekeeping.

Included:

aol.com
aol.fr
clear.net.nz
cox.net
comcast.net
cs.com
earthlink.net
freenet.de
freeserve.co.uk
gmx.at
gmx.ch
gmx.de
gmx.net
hotmail.com
hotmail.co.uk
hotmail.de
hotmail.fr
Ihug.co.nz ...
and the list goes on.