Mailinglist Archive: opensuse-security (195 mails)

< Previous Next >
RE: [suse-security] sendmail -- sender domain must resolve
Chrissy,

I expect that you will always get this response, it is common for the
domain not to have an IP address, after all, which machine should it
tell you about? If you tried www.bebe.com, you will probably get an
IP address as that will translate to an actual machine.

Sendmail will always assume MX records as these are all that is
relevant to it. Why should sendmail worry about the web or FTP
address ;-)

Alan

> ----------
> From: Chrissy LeMaire[SMTP:chrissy@xxxxxxxxxxxx]
> Sent: 21 March 2000 18:06
> To: suse-security@xxxxxxxx
> Subject: [suse-security] sendmail -- sender domain must resolve
>
> 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?
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: suse-security-unsubscribe@xxxxxxxx
> For additional commands, e-mail: suse-security-help@xxxxxxxx
>

< Previous Next >
This Thread
  • No further messages