Without proper SPF records your mail stands little chance of making it through some of the larger providers, like gmail, if you are sending in any high volume. You should be using SPF, DK, and DKIM signing.
I don't really understand how your security company related SPF to DoS though. They're unrelated, with the exception of backscatter. -j On Mon, Oct 4, 2010 at 9:47 AM, Greg Whynott <greg.whyn...@oicr.on.ca> 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. > > 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 > > > > > > >
