nanog mailing list archives
Re: AW: SPF Configurations
From: "John R. Levine" <johnl () iecc com>
Date: 4 Dec 2009 19:54:11 -0500
Right. The only major mail system that pays attention to SPF is Hotmail, but there are enough small poorly run MTAs that use it that an SPF record which lists your outbounds and ~all (not -all) can be marginally useful to avoid bogus rejections of your mail.For example : [ various large ISPs that publish SPF ]
Perhaps this is a language problem. In English, "publishes" is not a synonym for "pays attention to." As I said, you need to publish SPF to get mail into Hotmail. That's why people do it.
I know there is a problem so far with forwarded emails but there is also a solution : [ hoary SRS proposal to change every SMTP server in the world to make them match what SPF does ]
Sigh.
Every time a mail arrives that is an SRS address the password and timestamp could be checked, and faked or outdated recipients could be rejected.
You might want to look at BATV, which has nothing to do with SPF, but I have found is quite useful for recognizing spam blowback. R's, John PS:
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Current thread:
- SPF Configurations Jeffrey Negro (Dec 04)
- Re: SPF Configurations Suresh Ramasubramanian (Dec 04)
- Re: SPF Configurations Dave CROCKER (Dec 04)
- <Possible follow-ups>
- RE: SPF Configurations Jeffrey Negro (Dec 04)
- Re: SPF Configurations Bret Clark (Dec 04)
- Re: SPF Configurations James Bensley (Dec 04)
- Re: SPF Configurations John Levine (Dec 04)
- AW: SPF Configurations Andre Engel (Dec 04)
- Re: AW: SPF Configurations John R. Levine (Dec 04)
- AW: AW: SPF Configurations Andre Engel (Dec 05)
- Re: SPF Configurations Bret Clark (Dec 04)
- Re: SPF Configurations Lars Eggert (Dec 04)
- Re: SPF Configurations Sean Donelan (Dec 06)
- Re: SPF Configurations Bill Stewart (Dec 06)
- Re: SPF Configurations Sean Donelan (Dec 07)
- Re: Official Mail, was SPF Configurations John Levine (Dec 07)
- Re: SPF Configurations Michael Holstein (Dec 07)
- Re: SPF Configurations Douglas Otis (Dec 07)
- Re: SPF Configurations Suresh Ramasubramanian (Dec 07)
- Re: SPF Configurations Tony Finch (Dec 08)