Building a bulk mail sender [closed]

Answer 1

First off get a component to do the heavy lifting. I would recommend: aspnetmail

Then setting up bulkmailing is as easy as downloading some example code.
WebMailer: Sending 1000s of emails from a web page without timing out.

The same vendor also supplies mx record checker / bounce mail checkers etc. This solution isn't free but the time you save not chasing bugs / inconsistencies in the standard mail component will make this worth your while.

Oh and if you want a bulk mailer which sits on the desktop that is also supplied: http://www.aspnetemail.com/rapidmailer/