Network

Configuring the anti-spam tools in Exchange 2007

Spam isn’t just annoying - it’s a security risk and a prime source of malware and phishing attacks. The new version of Exchange has more effective tools to keep it at bay. Configure the anti-spam tools in Exchange 2007 with our step-by-step guide.



 

Once you’ve enabled Exchange 2007’s anti-spam features, use the Exchange Management Console’s Anti-spam tab to manage your anti-spam arsenal. You’ll find it in the Hub Transport section of Organization Configuration.
Once you’ve enabled Exchange 2007’s anti-spam features, use the Exchange Management Console’s Anti-spam tab to manage your anti-spam arsenal. You’ll find it in the Hub Transport section of Organization Configuration.

2. Open the Content Filtering Properties dialog to tune your accept/reject/quarantine actions. Set an appropriate SCL score for each action, and remember to fill in the SMTP address of your quarantine mailbox.
2. Open the Content Filtering Properties dialog to tune your accept/reject/quarantine actions. Set an appropriate SCL score for each action, and remember to fill in the SMTP address of your quarantine mailbox.

3. Once you’ve enabled IP Block Lists you can set up a set of block list providers to use Realtime DNS Block Lists. Spamhaus’ Zen list is a powerful tool that blocks mail from known spammers – and from active botnet member PCs.
3. Once you’ve enabled IP Block Lists you can set up a set of block list providers to use Realtime DNS Block Lists. Spamhaus’ Zen list is a powerful tool that blocks mail from known spammers – and from active botnet member PCs.

4. If a message is being sent to an address that’s not in your global address book, then it’s probably a spammer trying a dictionary attack on your mail server. Blocking these messages by default simplifies anti-spam processing.
4. If a message is being sent to an address that’s not in your global address book, then it’s probably a spammer trying a dictionary attack on your mail server. Blocking these messages by default simplifies anti-spam processing.

5. SenderID is a relatively new method of assuring that mail comes from a specific server and domain. It’s not widely in use yet, but it’s worth making it part of your spam detection toolset. Even so, don’t rely on it alone.
5. SenderID is a relatively new method of assuring that mail comes from a specific server and domain. It’s not widely in use yet, but it’s worth making it part of your spam detection toolset. Even so, don’t rely on it alone.

 

 


 
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leave When you add a new user and their email address doesn't show up in the Global Address List, work through the tips and suggestions in the ever-useful Exchangepedia Blog: http://exchangepedia.com/blog/2005/11/new-user-does-not-show-up-in-gal.html
Bulk-add new users with the script here (http://www.exchangepedia.com/blog/2006/11/exchange-server-2007-bulk-creation-of.html) or give existing users mail access (http://exchangepedia.com/blog/2006/12/bulk-mailbox-enabling-users-exchange-shell.html - this also has details for adding multiple meeting rooms as resources). And when an employee gets replaced, the steps at http://exchangepedia.com/blog/2006/03/how-to-reconnect-mailbox-to-another.html make it easy to connect the previous user's mailbox to the new user account so that mail for that job role keeps going to the right place. Reject spam with a custom message Just in case the message you're rejecting comes from a real person, you can have Exchange send a less cryptic message that the default error; it will make your customers look more professional. This blog post http://mostlyexchange.blogspot.com/2006/12/exchange-2003-sp2-imf-tuning.html
explains how - but make sure to keep the 550 error code at the beginning.
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