IETF SMTP Working Group Proposal at smtpng.org

Wed Aug 21 15:23:36 UTC 2002

On Wed, Aug 21, 2002 at 10:53:19AM -0400, Ron da Silva wrote:
> >  I'd like to be able to publish DNS records announcing my domain's *outbound*
> > mail servers, with nice abbreviated forms to say "they're the same as my
> > inbound (MX) records" or "any IP in x.y.z/24".  Then cooperative ISPs (like say
> > America Online) could refuse any email from my domain that originated from some
> > random cable modem, instead of accepting it and then flooding me with 20000
> > bounce messages.
> 
> What about this email from you which came to me from Merit and not your
> mail server?  Would break mailing lists and listserves unless the from
> field is overwritten.

No, because a mailer doesn't look at headers - it looks at the SMTP
envelope, and mailinglists set this to point to an address of
themselves to monitor bounces.

Greetz, Peter
-- 
MegaBIT - open air networking event - http://www.megabit.nl/