lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Wed Jun  7 20:27:13 2006
From: michael.holstein at csuohio.edu (Michael Holstein)
Subject: Strange Emails -- What are they?

> What would really help is SPF, if you can manage it. That way you can 
> reject mail that claims to come from your domain but does not come from 
> your mail servers.  But this is all a bit OT, not really full disclosure.

Well, sort of. Too many domains do something like '~' or '?' instead of 
'-' like they should.

(dig -t txt $domain) :

AOL : ?all
Hotmail/MSN : ~all
Google : ~all

http://en.wikipedia.org/wiki/Sender_Policy_Framework

AOL's is perticularly ironic, considering they hard-hand other folks 
into publishing a SPF record to deliver to them, but publish a ?all (no 
policy) record themselves.

What you can do quite effectively though, is to consider SPF (to 
penalize) as one of several factors in something like SpamAssassin.

~Mike.

Powered by blists - more mailing lists