nanog mailing list archives
Re: do you use SPF TXT RRs? (RFC4408)
From: William Herrin <bill () herrin us>
Date: Mon, 4 Oct 2010 14:48:47 -0400
On Mon, Oct 4, 2010 at 12:47 PM, Greg Whynott <Greg.Whynott () 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. how many of you are using SPF records? Do you have an opinion on their use/non use of?
I use your SPF records (if you offer any) to prevent my servers from slamming your servers with backscatter from someone forging your address and sending me undeliverable email. Without SPF records, you'll receive an undeliverable report for messages "from" you that I can't deliver -- just like the RFC says I "must." Regards, Bill Herrin -- William D. Herrin ................ herrin () dirtside com bill () herrin us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
Current thread:
- Re: do you use SPF TXT RRs? (RFC4408), (continued)
- Re: do you use SPF TXT RRs? (RFC4408) Suresh Ramasubramanian (Oct 04)
- Re: do you use SPF TXT RRs? (RFC4408) Valdis . Kletnieks (Oct 04)
- Re: do you use SPF TXT RRs? (RFC4408) Owen DeLong (Oct 05)
- Re: do you use SPF TXT RRs? (RFC4408) Greg Whynott (Oct 04)
- Re: do you use SPF TXT RRs? (RFC4408) Michael Loftis (Oct 04)
- Re: do you use SPF TXT RRs? (RFC4408) bmanning (Oct 04)
- Re: do you use SPF TXT RRs? (RFC4408) Rich Kulawiec (Oct 04)
- Re: do you use SPF TXT RRs? (RFC4408) Douglas Otis (Oct 04)
- Re: do you use SPF TXT RRs? (RFC4408) Suresh Ramasubramanian (Oct 04)
- Re: do you use SPF TXT RRs? (RFC4408) Greg Whynott (Oct 04)
- Re: do you use SPF TXT RRs? (RFC4408) William Herrin (Oct 04)
- Re: do you use SPF TXT RRs? (RFC4408) Tony Finch (Oct 04)
- Re: do you use SPF TXT RRs? (RFC4408) Kevin Stange (Oct 04)
- Re: do you use SPF TXT RRs? (RFC4408) Stefan Bethke (Oct 05)
- Re: do you use SPF TXT RRs? (RFC4408) Douglas Otis (Oct 05)
- re: do you use SPF TXT RRs? (RFC4408) Nick Olsen (Oct 04)
- RE: do you use SPF TXT RRs? (RFC4408) Nathan Eisenberg (Oct 04)
- Re: do you use SPF TXT RRs? (RFC4408) Jared Mauch (Oct 04)
- RE: do you use SPF TXT RRs? (RFC4408) Nathan Eisenberg (Oct 04)