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RELAY EXCHANGE MAIL THROUGH QMAIL

Posted on 2004-04-20
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I have two servers.  One Exchange 2000 box running on Windows 2000 and a Linux box set up with QMail for SMTP.

Interesting problem.  Because of the gepgraphic location of my company's offices, I am only able to get Comcast DSL.  The problem is that the IP addresses that are randomly assigned to my Comcast account are usually blacklisted and many outgoing emails from my Exchange server aren't able to be delivered to AOL and other ISP addresses.  I suppose they automatically blacklist IP's from ISP's - or someone has abused the IP I currently have in the past.

I'd like to relay all my outgoing mail from Exchange through my QMail box.  My QMail box is off site, and I know it doesn't have these blacklisting problems.

Is it as simple as setting up a "smart host" on my "SMTP Connector" in Exchange to point to the QMail box?  I know that I need to add my Exchange servers' hostname to the "rcpthosts" file in QMail first.

I have already tried relaying messages through my Comcast SMTP server (smtp.conmcast.net) without success.  However, I am not clear if the problem is me or Comcast.

If anyone knows of a guide about this topic, or has personal experience, I would greatly appreciate the input.

Thanks!

Brendan
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Question by:brendanwov
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Vahik earned 2000 total points
ID: 10875597
i dont know anything about Qmail but if Qmail will allow relaying and u know how to set it up then all u have to do in ur exchange's smtp servers
smart host section put the public ip address of ur Qmail server(u can setup
smtp connector also if u like and in the smart host section put the public  ip address of ur Q mail).since all ur mail will be routed to the Q mail for relaying  u can use a diff port(26) if u like.
one thing i dont understand if u can relay through ur Qmail and u know it is not a problem why are u trying to relay through comcasts smtp server
if u know they are being blacklisted by ISP's.
Have u tried relaying through ur Qmail to see if u are successfull ?Any problems?
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Author Comment

by:brendanwov
ID: 10878357
Vahik,

The IP's that are assigned to Cable Modems, DSL Modems and Dial-Up Users are blacklisted.  However, smtp.comcast.net is an array of servers dedicated to SMTP.  These servers are not blacklisted.  If they were, all Comcast users with Comcast email addresses would not be able to send email to anyone.

I think I may have had delayed success last night with relaying email through Comcast and didn't realize it.  I am going to try it again.

In any case, you are also correct that I can relay thorugh QMail without a problem.  I would prefer not to do that because we use the QMail box for our email marketing (non-spam).  There are a number of configurations on that server that would not be practical for individuals to use as SMTP.  However, if I need to use it, I will.

Thanks for your response!

Brendan
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LVL 26

Expert Comment

by:Vahik
ID: 10880107
Thanks brenden.I think very soon noone will be able to send mail to anyone.everyone is blacklisting everyone.I say walky talkies will be
popular very soon.U guys are lucky to have another server what if u did
not have that server?
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