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Date:      Fri, 2 Aug 2013 10:21:00 +0000
From:      Ruben de Groot <mail25@bzerk.org>
To:        Pavel Timofeev <timp87@gmail.com>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: Strange sendmail behaviour after upgrade to 9.1-BETA2
Message-ID:  <20130802102100.GA11138@eris.bzerk.org>
In-Reply-To: <CAAoTqfv_XAwCUkBh4WFhdNTEe7wZ4_Sbpis3OCacUrwoT-p4NA@mail.gmail.com>
References:  <CAAoTqfvmsYc=fE9AZyzf9GKBtbazdu%2B3jmD5TjhMqQHDnrtrkw@mail.gmail.com> <CAAoTqfsftjLQMLZpnwtPJYV2gKEn3kumYVycKroi5%2BaEbjEoJQ@mail.gmail.com> <CAAoTqftbCS_g45e6m9tXhR0wc3Q5-9kWmUDCANX597h8DRQakg@mail.gmail.com> <CAAoTqfuqYkgHg9--wev8Qji7fVvDVB-BVdP1hO=KD4SfuP-RXw@mail.gmail.com> <CAAoTqftW2KJtQnZpk=DV6snXyu21agdaX_8ku0%2B623FDVW71gw@mail.gmail.com> <CAAoTqfv_XAwCUkBh4WFhdNTEe7wZ4_Sbpis3OCacUrwoT-p4NA@mail.gmail.com>

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On Wed, Jul 31, 2013 at 04:54:08PM +0400, Pavel Timofeev typed:
> I've just installed new fresh 9.2-BETA2 amd64 on another machine.
> Same behaviour - Sendmail asks DNS only for AAAA record of mx server.
> We don't use IPv6 in our company.
> 
> 2013/7/31 Pavel Timofeev <timp87@gmail.com>:
> > I wanted to say that sendmail asks only AAAA (IPv6) record of mx
> > server, but not A (IPv4).
> > Any ideas?
> >
> > 2013/7/31 Pavel Timofeev <timp87@gmail.com>:
> >> Looks like my sendmail uses only IPv6 to resolve mx server dns name to
> >> ip address.
> >>
> >> 14:59:50.793338 IP reticulum.xxx.ru.19032 > hercules.xxx.ru.domain:
> >> 53417+ AAAA? xxx.ru. (24)
> >>                                                    [13/98]
> >> 14:59:50.793662 IP hercules.xxx.ru.domain > reticulum.xxx.ru.19032:
> >> 53417* 0/1/0 (75)
> >> 14:59:50.793696 IP reticulum.xxx.ru.55299 > hercules.xxx.ru.domain:
> >> 53418+ A? xxx.ru. (24)

Here it is definately asking an A record.

> >> 14:59:50.794087 IP hercules.xxx.ru.domain > reticulum.xxx.ru.55299:
> >> 53418* 7/0/0 A 192.168.2.11, A 192.168.2.12, A 192.168.41.4, A
> >> 192.168.14.12, A 192.168.34.100, A 192.168.34.110, A 192.168.44.19
> >>  (136)

And here is the reply. The quetion is more why is it repeating the same
query (below) over and over.

Ruben

> >> 14:59:50.973445 IP reticulum.xxx.ru.29244 > hercules.xxx.ru.domain:
> >> 53419+ MX? xxx.ru. (24)
> >> 14:59:50.973754 IP hercules.xxx.ru.domain > reticulum.xxx.ru.29244:
> >> 53419* 1/0/1 MX kalmar.xxx.ru. 10 (63)
> >> 14:59:50.974061 IP reticulum.xxx.ru.56461 > hercules.xxx.ru.domain:
> >> 53420+ AAAA? kalmar.xxx.ru. (31)
> >> 14:59:50.974340 IP hercules.xxx.ru.domain > reticulum.xxx.ru.56461:
> >> 53420* 0/1/0 (82)
> >> 14:59:50.974570 IP reticulum.xxx.ru.28332 > hercules.xxx.ru.domain:
> >> 53421+ AAAA? kalmar.xxx.ru. (31)
> >> 14:59:50.974887 IP hercules.xxx.ru.domain > reticulum.xxx.ru.28332:
> >> 53421* 0/1/0 (82)
> >> 14:59:50.974919 IP reticulum.xxx.ru.21453 > hercules.xxx.ru.domain:
> >> 53422+ AAAA? kalmar. (24)
> >> 14:59:50.975290 IP hercules.xxx.ru.domain > reticulum.xxx.ru.21453:
> >> 53422 ServFail 0/0/0 (24)
> >> 14:59:50.975314 IP reticulum.xxx.ru.63038 > hercules.xxx.ru.domain:
> >> 53422+ AAAA? kalmar. (24)
> >> 14:59:50.975674 IP hercules.xxx.ru.domain > reticulum.xxx.ru.63038:
> >> 53422 ServFail 0/0/0 (24)
> >> 14:59:50.975749 IP reticulum.xxx.ru.38393 > hercules.xxx.ru.domain:
> >> 53423+ AAAA? kalmar.xxx.ru. (31)
> >> 14:59:50.976105 IP hercules.xxx.ru.domain > reticulum.xxx.ru.38393:
> >> 53423* 0/1/0 (82)
> >> 14:59:50.976176 IP reticulum.xxx.ru.45558 > hercules.xxx.ru.domain:
> >> 53424+ AAAA? kalmar. (24)
> >> 14:59:50.976483 IP hercules.xxx.ru.domain > reticulum.xxx.ru.45558:
> >> 53424 ServFail 0/0/0 (24)
> >> 14:59:50.976512 IP reticulum.xxx.ru.45297 > hercules.xxx.ru.domain:
> >> 53424+ AAAA? kalmar. (24)
> >> 14:59:50.976864 IP hercules.xxx.ru.domain > reticulum.xxx.ru.45297:
> >> 53424 ServFail 0/0/0 (24)
> >>
> >> How to force it to use IPv4?
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