nanog mailing list archives

Re: [BULK] Re: SORBS contact


From: William Herrin <bill () herrin us>
Date: Fri, 29 Jul 2011 09:48:44 -0400

On Fri, Jul 29, 2011 at 2:46 AM,  <Valdis.Kletnieks () vt edu> wrote:
And you might want to fix it, since your users will never get a bounce notice
from any RFC-compliant mailer - even if they *wanted* to know that their mail
wasn't delivered.  <> is the RFC-standard way to denote "this mail is a bounce
report or other programmatically generated mail, and if it bounces itself, do *not*
generate another bounce, as that may start a bounce loop".

Correction: It's a standard way to denote that "this mail is a bounce
report." Any other sort of programmatically generated email is
supposed to use an email address capable of receiving a reply so that
the sender becomes aware that it failed to be delivered. One defense
against so-called blowback spam is to refuse bounce reports which do
not, somewhere within the message, contain an email address that the
bounce recipient recently sent to.

Regards,
Bill Herrin


-- 
William D. Herrin ................ herrin () dirtside com  bill () herrin us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004


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