Dialin Problem: How to Transmit Whole E-mail Address as Username?

[Art Lemasters <familyop@rmi.net>]

  How can I transmit my whole e-mail address as my username for
a dialin account login?  Do the "@" and dots in the domain name
need to be escaped somehow?

  My ISP is transferring all dialin accounts to another ISP, thus
the change from transmitting whole e-mail addresses instead of
only usernames for logins.

  I am running unstable, pppd and pap.  Please reply to
familyops@rmi.net, as I am not subscribed to debian-user until
after the ISP switch.  Thank you!

Art