MS Exchange 2003 - Enforce SPF

I have an MS Exchange 2003 server in an AD...

How can I enforce the SPF?
agortsAsked:
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Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
Well not really you can setup a SPF record for your domain(s) but that will depend if the recipenet mail servers do a spf lookup...
For your server to do SPF lookups...here you go:  
http://www.msexchange.org/articles/SPF-support-Exchange-freeware.html
 
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agortsAuthor Commented:
Do I have to purchase GFI Mail Essential???

Is SPF supported by the Exchange 2003? Do I need something extra?
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Alan HardistyCo-OwnerCommented:
Make sure you have Exchange 2003 Service Pack 2 installed and then read through this article to configure Sender ID Filtering:
http://www.msexchange.org/tutorials/Configuring-enabling-Sender-ID-filtering-Exchange-2003-SP2.html
You don't need to buy 3rd party software to make this work.
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agortsAuthor Commented:
I have enabled the "Apply sender ID filter" in the SMTP virtual server of a specific mail server...
I selected "reject..." in Sender ID Filtering tab of properties of Message Delivery...
I do a telnet xxx 25 in this server, from outside the local network (from the internet) and send an email with "mail from" as xxx@YYY.com (where YYY.com is the domain name which this email server serves...)...
The email delivers to xxx (me)...
It looks like it is not working (the SPF filter)...

Any ideas?
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Alan HardistyCo-OwnerCommented:
Have you got an SPF record setup?
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agortsAuthor Commented:
Yes I have already set it up and checked...
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Alan HardistyCo-OwnerCommented:
Would you like to drop me an email with your domain name, IP address and email address in so that I can check your domain settings and test from my IP address.  If so, please email me at alanhardisty @ experts-exchange.com.
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Alan HardistyCo-OwnerCommented:
Thanks for your email.  SPF is setup happily, so you may not have setup / enabled Sender ID Checking properly.
You have enabled the Sender ID on the Message Delivery Section, have you enabled the Sender ID check on the SMTP Virtual Server properties> General Tab> Advanced Button> Edit Button?
 
After enabling on the SMTP Virtual Server, restart the Simple Mail Transfer Protocol service and let me know so that I / you can test again.
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Alan HardistyCo-OwnerCommented:
Check also that you have Exchange 2003 SP2 installed.
Have you got any 3rd party Anti-Spam software running on the server?
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Alan HardistyCo-OwnerCommented:
Your email states that you have Symantec Mail Security for Microsoft Exchange installed and that you have Service Pack 2 installed.
Please read the following article from Symantec for details of how to prevent Spoofed mail via their software which will be preventing you from setting this on the Exchange server:
http://service1.symantec.com/SUPPORT/ent-gate.nsf/docid/2008121815234654
This references the following article to setup a filter:
http://service1.symantec.com/SUPPORT/ent-gate.nsf/docid/2008121815164254?Open&seg=ent
Please post any more replies on EE so that the question does not get too one-sided.
Thanks
Alan
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agortsAuthor Commented:
It seems that do not support SPF...
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