POP account gets truncated at the "@" sign

[Tom Robinson]

Server Name: [EMAIL PROTECTED]
User Name: [EMAIL PROTECTED]

Netscape Messenger truncates the user name string to "myname" before sending
it to the POP server, preventing login. The POP server requires the full
e-mail address to be used as the user name, since one POP server handles
hundreds of domains.

Any workaround?