Forwarding e-mail thru your ISP. How?

[MarksSE]

I am running my own domain over my broadband connection and several of the big ISPs block e-mail from domains that reside on DSL and cable broadband network blocks. I've heard that you can forward your email through your ISP and avoid being blocked. Is this true and how do you configure it for MS Exchange? THANKS!!!

-Mark

P.S. Here's an example I found on Slashdot regarding this topic, regarding Sendmail though...:
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One thing that you can do is foreward your email through your ISP. If you're using Sendmail this is done with the smarthost entry:
# "Smart" relay host (may be null)
DSmail.MyISP.net
would forward youre spam (er, email) through the box mail.myISP.net . Most ISPs have a designated server that will allow email forewarding from anybody in their network space.

 

[IcePirate]

Alot of service providers are now blocking mail sent from dynamically assigned ip addresses. They think that this will help with the spamming. It just hurts the rest of us though. I have had the same problem myself. If you use your ip's outgoing mail server, you should be fine. That is, if they let you. Some providers allow relaying by ip address and some allow by domain only. It just depends on your provider.

Damn the Man!