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Re: Anti-recommendation: Comcast.

 On Jan 20, 2008 12:50 PM, Tom Metro <[hidden email]> wrote: 
> Bill Horne wrote: 
> > Checking for PTR records is routine for most ISP's... 
> I'm referring to not just checking for the presence of a PTR record, but 
> applying a regular expression to the format of the returned PTR record. 
> This I consider arbitrary, and highly error prone. 

I've noticed over about the last 2 years, that more and more ISPs and 
businesses are checking to make sure your A and PTR records match what 
your mail system is claiming to be. 

But you're right, a better approach would be for people to adopt 
either Domain Keys or SPF.  Problem is there is no standard, so 
everyone is doing it their own way. 


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