nanog mailing list archives
Reverse DNS and SMTP
From: "Patrick Muldoon" <doon () inoc net>
Date: Thu, 28 Feb 2002 15:14:49 -0500
We have recently implemented a policy on our mail servers of not accepting mail from hosts that do not correctly resolve via reverse DNS. While we on the technical side love the idea, there have been some questions from the business side of the house. If an ISP who doesn't have reverse DNS setup correctly on their mail servers, we point them to the RFC's and generally offer to help them correct it. We have noticed that our spam has reduced drastically, and the complaints are few, but alas this is a double edged sword, where if you even block 1 legitimate e-mail out of the 100K+ that we receive daily, someone is going to complain. Just curious if anybody here is doing the same and the response that they have had from doing so. Replies off list are fine and I will summarize if people are interested. Thanks, Patrick -- Patrick Muldoon, Network/Software Engineer INOC, LLC doon () inoc net Press Ctrl-Alt-Del now for IQ test.
Current thread:
- Reverse DNS and SMTP Patrick Muldoon (Feb 28)
- RE: Reverse DNS and SMTP Daniel Lark (Feb 28)
- Re: Reverse DNS and SMTP Jared Mauch (Feb 28)
- Re: Reverse DNS and SMTP Nicole Harrington (Feb 28)
- Re: Reverse DNS and SMTP Paul Timmins (Feb 28)
- Re: Reverse DNS and SMTP Chris Adams (Feb 28)
- Re: Reverse DNS and SMTP Jared Mauch (Feb 28)
- RE: Reverse DNS and SMTP Mathias Koerber (Feb 28)
- RE: Reverse DNS and SMTP Daniel Lark (Feb 28)
- <Possible follow-ups>
- RE: Reverse DNS and SMTP Pete Stephenson (Feb 28)
- Re: Reverse DNS and SMTP Conrad A. Rockenhaus (Feb 28)
- Re: Reverse DNS and SMTP David Charlap (Feb 28)