nanog mailing list archives
Re: Is Hotmail in the habit of ignoring MX records?
From: Jimmy Hess <mysidia () gmail com>
Date: Fri, 27 Jul 2012 20:00:30 -0500
On 7/27/12, Tony Finch <dot () dotat at> wrote:
That would be a seriously broken violation of the SMTP specification.
I would definitely agree it would be quite broken behavior, but you know, I never said Hotmail's processing wasn't broken -- only that they seem to honor MX records in the common case. If you are doing something unusual like "mail MX bla bla" I would say you can't rule that out as a possible cause, just because some RFC suggests it should be OK. The spec does say that you're not allowed to chain MX records. But i'm not so sure that the specification actually prohibits a SMTP server from doing that, if someone does try to chain MX records. it may also be out of spec to have a "MX" record point to a dns label that a MX record exists for in the first place.
Tony. -- f.anthony.n.finch <dot () dotat at> http://dotat.at/
-- -JH
Current thread:
- Is Hotmail in the habit of ignoring MX records? Lou Katz (Jul 26)
- Re: Is Hotmail in the habit of ignoring MX records? Suresh Ramasubramanian (Jul 26)
- Re: Is Hotmail in the habit of ignoring MX records? Ryan Rawdon (Jul 26)
- Re: Is Hotmail in the habit of ignoring MX records? Tony Finch (Jul 27)
- Re: Is Hotmail in the habit of ignoring MX records? Jimmy Hess (Jul 27)
- Re: Is Hotmail in the habit of ignoring MX records? David Miller (Jul 27)
- Re: Is Hotmail in the habit of ignoring MX records? Michael J Wise (Jul 27)
- Re: Is Hotmail in the habit of ignoring MX records? Mark Andrews (Jul 27)
- Re: Is Hotmail in the habit of ignoring MX records? Michael J Wise (Jul 27)
- Re: Is Hotmail in the habit of ignoring MX records? Suresh Ramasubramanian (Jul 26)
- Re: Is Hotmail in the habit of ignoring MX records? Lou Katz (Jul 26)
- Re: Is Hotmail in the habit of ignoring MX records? Mark Foster (Jul 26)
- Re: Is Hotmail in the habit of ignoring MX records? Michael J Wise (Jul 26)
- Re: Is Hotmail in the habit of ignoring MX records? Mark Andrews (Jul 26)
- Re: Is Hotmail in the habit of ignoring MX records? Michael J Wise (Jul 26)