nanog mailing list archives
Re: verizon.net and other email grief
From: "Paul G" <paul () rusko us>
Date: Fri, 10 Dec 2004 15:19:05 -0500
----- Original Message ----- From: "Roy" <garlic () garlic com> To: "Rich Kulawiec" <rsk () gsp org>; <nanog () merit edu> Sent: Friday, December 10, 2004 2:23 PM Subject: RE: verizon.net and other email grief
While I can't speak to what Verizon is using, Both Exim and Postfix have
the
very same feature called "address verification". Its in use at a number
of
ISPs. My systems reject 1000's of messages every day because of verification failures.
i've never seen this done with postfix, but i know that exim's default 'address verification' for non-local addresses just checks that the domain in the from is valid and that an mx record exists for it. they also have what they call 'callout verification', which is equivalent to what is being discussed, but the documentation makes the drawbacks painfully clear and suggests that it only be used against hosts within the same organization. i'm not a fan of exim, but it appears that although they've given users the rope, they've been diligent enough to label it appropriately. -p --- paul galyinin
Current thread:
- verizon.net and other email grief Simon Waters (Dec 10)
- Re: verizon.net and other email grief Rich Kulawiec (Dec 10)
- RE: verizon.net and other email grief Roy (Dec 10)
- RE: verizon.net and other email grief Christopher X. Candreva (Dec 10)
- Re: verizon.net and other email grief Paul Trebilco (Dec 10)
- Re: verizon.net and other email grief Michael Loftis (Dec 10)
- Re: verizon.net and other email grief Paul G (Dec 10)
- Re: verizon.net and other email grief Michael Loftis (Dec 10)
- RE: verizon.net and other email grief Roy (Dec 10)
- RE: verizon.net and other email grief william(at)elan.net (Dec 10)
- Re: verizon.net and other email grief Rich Kulawiec (Dec 10)
- Re: verizon.net and other email grief Paul G (Dec 10)
- Re: verizon.net and other email grief Peter Corlett (Dec 10)
- Re: verizon.net and other email grief Steven Champeon (Dec 10)
- Re: verizon.net and other email grief Valdis . Kletnieks (Dec 10)
- Re: verizon.net and other email grief Krzysztof Adamski (Dec 10)
- Re: verizon.net and other email grief Crist Clark (Dec 10)
- Re: verizon.net and other email grief Jeffrey I. Schiller (Dec 10)