nanog mailing list archives
Re: Mailserver requirements
From: Daniel Roesen <dr () cluenet de>
Date: Tue, 6 Apr 2004 00:55:09 +0200
On Mon, Apr 05, 2004 at 11:53:15PM +0200, Arnold Nipper wrote:
of course this server does have a reverse mapping. But this reverse mapped doamin does not have an MX record.Does it have an A RR?It also does have an A RR. And the forward mapping does also match the IP address.
OK, so the check is even broken in what it probably tries to verify... that the reverse-domain of the sender IP would (possibly) be able to receive mail (bounces).
Anyway... it's a heuristic which definately does give false positives. The only requirement is that IF a domain/host accepts mail there MUST be a postmaster@ address.In this case the host *sends* mail ...
Sure. I was discussing the requirements for domains regarding email. In this specific case, "domain" being the domain of the PTR of the sending MTA host. Regards, Daniel
Current thread:
- Mailserver requirements Arnold Nipper (Apr 05)
- Re: Mailserver requirements Niels Bakker (Apr 05)
- Re: Mailserver requirements Valdis . Kletnieks (Apr 05)
- Re: Mailserver requirements Charles Sprickman (Apr 05)
- Re: Mailserver requirements Peter Galbavy (Apr 06)
- <Possible follow-ups>
- RE: Mailserver requirements Mike Walter (Apr 05)
- Re: Mailserver requirements Arnold Nipper (Apr 05)
- Re: Mailserver requirements Daniel Roesen (Apr 05)
- Re: Mailserver requirements Arnold Nipper (Apr 05)
- Re: Mailserver requirements Daniel Roesen (Apr 05)
- Re: Mailserver requirements Jim Segrave (Apr 06)
- Re: Mailserver requirements Arnold Nipper (Apr 05)
- Re: Mailserver requirements Valdis . Kletnieks (Apr 05)
- Re: Mailserver requirements Richard Welty (Apr 05)
- Re: Mailserver requirements Niels Bakker (Apr 05)
- Re: Mailserver requirements Jeff Workman (Apr 05)
- Re: Mailserver requirements Richard Welty (Apr 05)