System.Net.Mail send anonymous emails from ASP.NET 3.5 -

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i'm needing send anonymous emails asp.net 3.5 app. website using active directory authentication, thing cannot use of user & pass send emails.

is there way send anonymous emails asp.net?, heard there way in sql (i'm using 2005) stored procedure, prefer sure cannot website first.

i have implemented using system.net.mail smtpclient class if don't specify host, user & pass doesn't work.

thanks


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