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do you use SPF TXT RRs? (RFC4408)

Subject: do you use SPF TXT RRs? (RFC4408)
From: Greg.Whynott at oicr.on.ca (Greg Whynott)
Date: Mon, 4 Oct 2010 12:47:52 -0400

A partner had a security audit done on their site.  The report said they were at risk of a DoS due to the fact they didn't have a SPF record.   

I commented to his team that the SPF idea has yet to see anything near mass deployment and of the millions of emails leaving our environment yearly,  I doubt any of them have ever been dropped due to us not having an SPF record in our DNS.  When a client's email doesn't arrive somewhere,  we will hear about it quickly,  and its investigated/reported upon.      I'm not opposed to putting one in our DNS,  and probably will now - for completeness/best practice sake..  


how many of you are using SPF records?  Do you have an opinion on their use/non use of?

take care,
greg

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