RE: [Declude.JunkMail] DNS SPF Record

[Kyle Fisher]

The way I understand it is that the server receiving the email does an SPF query to your DNS server to see if you have an SPF record defining that only mail from this domain should come from this mx or ip4 address.   This doesn’t work very well if the receiving server doesn’t do an SPF record lookup.  I guess it will take some time until everyone implements this into their DNS.   I did it for mine yesterday.  I didn’t even know what this was until I saw SPFFAIL in my declude file then I started researching it.   Kyle   From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of William Stillwell Sent: Tuesday, April 26, 2005 9:29 AM To: Declude.JunkMail@declude.com Subject: Re: [Declude.JunkMail] DNS SPF Record   How does SPF tell you that a rouge server is forging mail from one of your customers, if you server isn't receiving the forged mail? I noticed the majority of other email admins arn't even Running spf..   for example: nremc.com   then, there are the 1,000,000,000,000 hosts that don't even have postmaster or abuse even setup.     ----- Original Message ----- From: Darin Cox To: Declude.JunkMail@declude.com Sent: Tuesday, April 26, 2005 9:57 AM Subject: Re: [Declude.JunkMail] DNS SPF Record   We use it.  For us the main benefit is to keep spammers from forging our customers' domains.  SPF tells us when the mail server sending the email from one of our customer's domains is not ours.  Works very nicely, and also is used as another bit of evidence to other email admins (since they often cannot be troubled to read the email headers...no one on this list, though <grin>) that the forged spam they received really did not originate from our servers. Darin.     ----- Original Message ----- From: Kyle Fisher To: Declude.JunkMail@declude.com Sent: Monday, April 25, 2005 12:44 PM Subject: [Declude.JunkMail] DNS SPF Record   Are most of you using a SPF record in your DNS?  Are you noticing a difference?   Kyle