Exchange 5.5 - SPAM 1

[Guest_imported]

I'm running Exchange Server 5.5 with the latest service pack and I'm not a know-all administrator.
I've set the IMS to "re-route SMTP mail" for my POP3 users, as recommended by Microsoft. The problem started when our domain was blackhole listed. I successfully got our domain off the list but now we're receiving a ton of SPAM. I've tried entering domains, e-mail addresses, etc. in the "filtering" portion of the IMS but still seem to be getting just as many junk e-mails. Does anyone have any suggestions other then 3rd party software for e-mail filtering?

 

[johnny99]

I think TrendMicro have some kind of software that could help you here. I don't remember the name, but I read something about this when I was looking for a product that scan for virus on a Domino server running under OS/400.

Another way is also to have a mail-relay server.
This could be on eg. a Linux running Sendmail og a WIN2K running NTMail (with Juce). There is also a lot of other products to do the same.

The setup could be:

under your domain record:

mx 10 <your current exchange server>
mx 20 <the new relay server>
mx <and what else you have now>

The you block access to <your current exchange server> from the internet in your firewall and only open for mail from <the new relay server>.

What this will do is that all mail from the internet will first go to the <the new relay server> and from there to <your current exchange server>
Under Sendmail og NTMail (using Juce) you can very easy handle a lot of this kind of problems.

I would also setup your <your current exchange server> to use <the new relay server> as outgoing relay server.

In our installation we use our firewall to filter out some of the emails but I thing we will implement the relay model using 2 servers running NTMail (and Juce)very soon.

If you go got the Linux/Sendmail version I could give you my own config files for Sendmail.

/johnny