[techtalk] Exim problem

[Kath]

I have a Debian 2.2 system that acts as a ipmasq server and a web/mail server.  I just reinstalled Debian, and now I can receive email sent from my ISP's account to [EMAIL PROTECTED] but I cannot send email from [EMAIL PROTECTED] to anywhere else.   I specifically get this error from Outlook:   The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was '[EMAIL PROTECTED]'. Subject 'More testing', Account: 'www.kathweb.net', Server: 'www.kathweb.net', Protocol: SMTP, Server Response: '550 relaying to <[EMAIL PROTECTED]> prohibited by administrator', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79   Any ideas?  I don't even know where to begin looking in the logs.   - Kath