nanog mailing list archives
Re: Reverse DNS and SMTP
From: David Charlap <David.Charlap () marconi com>
Date: Thu, 28 Feb 2002 17:06:04 -0500
Jared Mauch wrote:
What I do is format my smtp headers such that a very simple regex can find mail with no reverse dns and dump it in a spam folder. I find this catches a lot of the messages.
If your server is using a heuristic that has the potential of offending your customers, you can make the blocking optional. More specifically, respond to the "spam detected" condition by writing a header that customers can check for. Once that header's in place, a customer can configure his mail client to accept, delete, or spam-folder the message. If a client wants these kinds of messages to be deleted on the server, that may not be too hard to do either, once the header is written. -- David
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)