I was wondering if somebody could give me a couple of pointers on what I am doing wrong. I have a a virtual smtp service in exchange system manager. Its all configured and I can send email. Once that was working I disabled anonymous authentication and enabled only the windows authentication. However, regardless of what username and password I put in outlook express, the mail goes through. The only time it doesn't go through is if I put no username in outlook express. This to me means, there is no authentication happening, its only checking that credentials exist.. and doesn't confirm credentials. I have also tested using the basic authentication with and without TLS. I basically get the same results with basic authentication, however with TLS nothing goes through regardless of who I authenticate as. Thoughts? Exchange 2k Windows 2k Confidentiality Notice Unless expressly stated otherwise, this message is confidential and may be privileged. It is intended for the addressee(s) only. Access to this e-mail by anyone else is unauthorized. If you are not an addressee, any disclosure or copying of the contents of this e-mail or any action taken (or not taken) in reliance on it is unauthorized and may be unlawful. If you are not an addressee, please inform the sender immediately and delete this message from your system.