I`ve been running gossamer mail for over a year with no troubles... then all the sudden i get:
------------
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, root@localhost and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.
-----
The server log says:

[Mon Sep 30 10:48:42 2002] [error] Premature end of script headers: /var/www/sites/gmail/cgi-bin/user/login.cgi
-----
Any suggestions?? thanks.