• From: Danny <nocmonkey@xxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Tue, 8 Feb 2005 21:36:58 -0500

On Wed, 9 Feb 2005 12:05:14 +1100, adrian@xxxxxxxxxxxxx
<adrian@xxxxxxxxxxxxx> wrote:
> What do I need my ISP (who maintains our external DNS ) to do for us to
> support SPF??  We have several domains and MX's all pointing back to the one
> box.  Is only one reverse DNS entry required?  Will this support all our
> domains?  Sorry for the ignorance but this is one area I am quite new to. 
> We run split-brain DNS (I assume that internal DNS is of no consequence in
> relation to SPF. 

Your ISP would add a TXT record in the DNS for your domain, which, in
SPF format, would specify the host or IP address of all the externally
(Internet) accessible servers that you would send email from. Check
out the SPF wizard here:


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