Mailinglist Archive: opensuse-security (195 mails)

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sendmail -- sender domain must resolve
  • From: Chrissy LeMaire <chrissy@xxxxxxxxxxxx>
  • Date: Tue, 21 Mar 2000 10:06:47 -0800
  • Message-id: <4.2.0.58.20000321095329.00bccb00@xxxxxxxx>
Hey All,
I'm running sendmail 8.9.3 and pretty much left everything default. The spam stoppers are in full effect..

I have a question about the following:

Mar 20 14:39:25 xxx sendmail[18726]: OAA18726: ruleset=check_mail, arg1=<xxx@xxxxxxxx>, relay=[111.111.111.111], reject=451 <xxx@xxxxxxxx>... Sender domain must resolve

So i do a bit of digging:

# nslookup

> bebe.com
Server: ns.server.com
Address: ip.addy.here

*** ns.server.com can't find bebe.com: Non-existent host/domain

> set type=mx
> bebe.com
Server: ns.server.com
Address: ipaddyhere

Non-authoritative answer:
bebe.com preference = 0, mail exchanger = bebe-mail.bebe.com

Authoritative answers can be found from:
bebe.com nameserver = AUTH02.NS.UU.NET
bebe.com nameserver = bebe-ns.bebe.com
bebe.com nameserver = BEBE-NS2.bebe.com
bebe-mail.bebe.com internet address = 208.240.224.197
AUTH02.NS.UU.NET internet address = 198.6.1.82
bebe-ns.bebe.com internet address = 208.240.224.225
BEBE-NS2.bebe.com internet address = 208.240.224.210


By looking at this.. I concluded that MX records aren't looked at when deciding if a domain resolves or not. So.. I do the some testing with hospitalforms.com (which doesnt resolve but has an MX record) and it worked..

So. Am I right when I assume that bebe.com's ns servers were most likely down for a period of time?
Auth02.ns.uu.net is huge.. and 3 nameservers all go down at the same time? This doesnt seem right.

Any suggestions?

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