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Posted to users@spamassassin.apache.org by Benny Pedersen <me...@junc.org> on 2006/08/31 04:05:34 UTC
Re: source SENDER authentication ? (as opposed to SPF HOST
authentication)
On Wed, August 30, 2006 19:37, Michel Vaillancourt wrote:
> to carve it... you actually open an SMTP conversation with
> ... trap that "5xx" return, and you know its a bogus sender.
> The plug-in adds 2 points to the score.
> Get a "250 Ok" back, and you are likely "safe"... score 0.
sendmail -bv BOB@REMOTE_DOMAIN.com
--
"This message was sent using 100% recycled spam mails."
Re: source SENDER authentication ? (as opposed to SPF HOST
authentication)
Posted by David B Funk <db...@engineering.uiowa.edu>.
On Thu, 31 Aug 2006, Benny Pedersen wrote:
> On Wed, August 30, 2006 19:37, Michel Vaillancourt wrote:
> > to carve it... you actually open an SMTP conversation with
> > ... trap that "5xx" return, and you know its a bogus sender.
> > The plug-in adds 2 points to the score.
> > Get a "250 Ok" back, and you are likely "safe"... score 0.
>
> sendmail -bv BOB@REMOTE_DOMAIN.com
>
For a local recipient it may be worth something but for a remote
address all it tells you is that your mail system knows how to
find the remote host.
EG:
% /usr/sbin/sendmail -bv I_AM_a_BOGUS_LLuser@aol.com
I_AM_a_BOGUS_LLuser@aol.com... deliverable: mailer relay, host mail-msa.icaen.uiowa.edu, user I_AM_a_BOGUS_LLuser@aol.com
--
Dave Funk University of Iowa
<dbfunk (at) engineering.uiowa.edu> College of Engineering
319/335-5751 FAX: 319/384-0549 1256 Seamans Center
Sys_admin/Postmaster/cell_admin Iowa City, IA 52242-1527
#include <std_disclaimer.h>
Better is not better, 'standard' is better. B{