you might want to try to pick this apart
http://www.codetools.com/csharp/SMTPAuthLogin.asp
Seems someone has done the work for you already .....
--
Regards
John Timney (Microsoft ASP.NET MVP)
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<shameless_author_plug>
Professional .NET for Java Developers with C#
ISBN:1-861007-91-4
Professional Windows Forms
ISBN: 1861005547
Professional JSP 2nd Edition
ISBN: 1861004958
Professional JSP
ISBN: 1861003625
Beginning JSP Web Development
ISBN: 1861002092
</shameless_author_plug>
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"Tibby" <ti*************@hotmail.com> wrote in message
news:Og**************@TK2MSFTNGP11.phx.gbl...
Is there anyway to send Authentication Credentials with SMTP Mail?
I'm using Exchange Server 2000, and I don't want to open relay on a large
scale....
Thanks
Tibby