nanog mailing list archives
AW: AW: SPF Configurations
From: "Andre Engel" <andre.engel () fhe3 com>
Date: Sat, 5 Dec 2009 21:53:54 +0100
John,
-----Ursprüngliche Nachricht----- Von: John R. Levine [mailto:johnl () iecc com] Gesendet: Samstag, 5. Dezember 2009 01:54 An: Andre Engel Cc: nanog () nanog org Betreff: Re: AW: SPF ConfigurationsRight. 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.
As I said im almost german :-) Some major providers ,1&1 for example, assigned their customers the "responsibility" to "pay attention on SPF" for getting mails into their boxes.(decision between suspicious or not)
I know there is a problem so far with forwarded emails but there isalso asolution : [ hoary SRS proposal to change every SMTP server in the world to makethemmatch what SPF does ]Sigh.
I do not want to change every SMTP servers in the world. I just gonna show an useful option .-)
Every time a mail arrives that is an SRS address the password andtimestampcould be checked, and faked or outdated recipients could be rejected.You might want to look at BATV, which has nothing to do with SPF, but I have found is quite useful for recognizing spam blowback.
Sure ! For instance If your are providing an mail cluster for your customer bills, a newsletter server or a cooperated mail cluster and you know that you are sending emails only to receivers email boxes BATV is indeed a awesome tool. But if you are performing a shared mail cluster for your webhosting or your Dial in customers which are using for instance some special kinds of mailing lists maybe you need a additional solution.
From a reputation perspective Id like the idea to combine a set of anti spam
tools if it is useful. Indeed MAAWG is not "the badest place" to learn about.
R's, John PS:This message (including any attachments) is the property of FHE3 andmaycontain confidential or privileged information. Unauthorized use ofthiscommunication is strictly prohibited and may be unlawful. If you have received this communication in error, please immediately notify thesenderby reply e-mail and destroy all copies of the communication and any attachments.Our policy is to send messages with confidentiality notices to all of your competitors.
Sure! Im here to learn *** .-) Cheers Andre -- Andre Engel Consulting Program Director, Email and Cyber Intelligence Services "..no space left on the device/Kein Weltraum links auf dem Gerät" FHE3 GmbH P: +49 721 869 5907 Scheffelstr. 17a M: +49 160 962 44476 76135 Karlsruhe andre.engel () fhe3 com http://www.fhe3.com/ Amtsgericht Mannheim, HRB 702495 Umsatzsteuer-Ident: DE254677931 Geschäftsführer: Peter Eisenhauer, Michael Feger, Dimitrij Hilt *** This email is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE ,...
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)
- Re: SPF Configurations Suresh Ramasubramanian (Dec 08)