Date: Sat, 22 Sep 2001 09:52:47 -0700 From: Gregory Neil Shapiro <gshapiro@freebsd.org> To: Mike Tancsa <mike@sentex.net> Cc: stable@freebsd.org Subject: Re: something strange with sendmail 8.11.6 on FreeBSD Message-ID: <15276.49631.32382.941@horsey.gshapiro.net> In-Reply-To: <5.1.0.14.0.20010922082451.05af6d70@192.168.0.12> References: <5.1.0.14.0.20010922082451.05af6d70@192.168.0.12>
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mike> OK, here is a strange one. Using the stock sendmail in FreeBSD
mike> STABLE, I am seeing strange timeouts to some hosts. e.g. mail to
mike> ica.net via icamail.ica.net.
> dig aaaa icamail.ica.net
; <<>> DiG 8.3 <<>> aaaa icamail.ica.net =
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 4
^^^^^^^^
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUERY SECTION:
;; icamail.ica.net, type =3D AAAA, class =3D IN
=46rom sendmail/README:
When attempting to canonify a hostname, some broken name servers will
return SERVFAIL (a temporary failure) on T_AAAA (IPv6) lookups. If you
want to excuse this behavior, compile sendmail with
-D_FFR_WORKAROUND_BROKEN_NAMESERVERS and add WorkAroundBrokenAAAA to your=
ResolverOptions setting. However, instead, we recommend catching the
problem and reporting it to the name server administrator so we can rid t=
he
world of broken name servers.
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