do you use SPF TXT RRs? (RFC4408)

Greg Whynott Greg.Whynott at
Mon Oct 4 13:54:15 CDT 2010

i think it was an observation they made,  and suggestions to make things better.   I don't think the message was "fix this or you'll be off the air one day.".   

  if they have a 56k port speed(stuck in the 80's),  there is potential there for a DoS from a large volume of spam back splatter..  8)  

  over all,  I'm inclined to accept your assumptions.   


On Oct 4, 2010, at 2:38 PM, Suresh Ramasubramanian wrote:

> On Mon, Oct 4, 2010 at 12:47 PM, Greg Whynott <Greg.Whynott at> wrote:
>> 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.
> This is pure unadulterated BS from someone who doesnt understand
> either DDOS mitigation, or SPF .. or more likely both.
> -- 
> Suresh Ramasubramanian (ops.lists at

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