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10.06.2008 at 02:48PM PDT, ID: 23792094
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8.5

How to set up a SPF record

Asked by grhelm in Internet Protocols, Exchange Email Server, Windows 2003 Server

Tags: , , ,

I need help with something I do not really understand.  I am getting over a thousand delivery errors within a few minutes because some spammer is using one of my email address as the "reply to" address on the junk they are sending out.  I understand that the SPF record is supposed to help prevent this from happening, but I can't seem to figure out how to set this up properly.

Let me first describe the environment I have:

Four Dell Windows2003 servers:
Exchange2003 Server  ES01  xx.xx.xx.157
Domain Controller Server  DC01  xx.xx.xx.190
Web Server  WS01  xx.xx.xx.131 - 150
Web Server  WS02  xx.xx.xx.156
I am hosting several domain names on the web servers and accept email for all of them on the Exchange server.

My understanding is that I should add the SPF record to the DNS server on DC01.  (Is that a correct assumption?)

How do I include all the domains in the SPF record?  (Or do I create multiple records for each domain?)

Initially, I had just:

v=spf1 mx ~all

in the DNS of the primary domain on DC01.  I have also tried other variations:
v=spf1 mx a:ES01 include:domain1.com ~all
v=spf1 mx ptr mx:smtp.domain1.com ip4:65.98.147.157 mx:domain2.com ~all

None seem to be working based on testing at:
http://www.microsoft.com/mscorp/safety/content/technologies/senderid/wizard/

Can anyone walk me through what this record (or records) need to look like so that I can verify it works via the microsoft test site listed above?

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Keywords: How to set up a SPF record
Title
1 DNS and SPF checks
2 SPF / DNS Records
3 SPF Records and the way they work
4 SPF RECORD
5 I have created an SPF record on my D…
6 Why Not SPF
 
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[+][-]10.06.2008 at 03:07PM PDT, ID: 22654845

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About this solution

Zones: Internet Protocols, Exchange Email Server, Windows 2003 Server
Tags: Microsoft, Windows, 2003, exchange, DNS, SPF
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Solution Provided By: pablovr
Participating Experts: 2
Solution Grade: A
 
 
[+][-]10.07.2008 at 03:39PM PDT, ID: 22664612

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[+][-]10.08.2008 at 09:50AM PDT, ID: 22670781

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[+][-]10.08.2008 at 10:50AM PDT, ID: 22671299

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[+][-]10.08.2008 at 11:04AM PDT, ID: 22671430

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[+][-]10.08.2008 at 11:15AM PDT, ID: 22671547

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[+][-]10.08.2008 at 11:17AM PDT, ID: 22671573

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[+][-]10.08.2008 at 11:18AM PDT, ID: 22671594

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[+][-]10.08.2008 at 11:20AM PDT, ID: 22671611

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[+][-]10.08.2008 at 11:28AM PDT, ID: 22671686

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[+][-]10.08.2008 at 11:35AM PDT, ID: 22671754

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[+][-]10.08.2008 at 12:51PM PDT, ID: 22672600

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[+][-]10.08.2008 at 01:47PM PDT, ID: 22673231

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[+][-]10.08.2008 at 02:21PM PDT, ID: 22673627

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