Internal sendmail problems
mark at blackmans.org
Wed Jan 2 16:40:43 GMT 2008
On 2 Jan 2008, at 16:26, Mark Blackman wrote:
> On 2 Jan 2008, at 16:15, O'Connor, Kevin wrote:
>> I ran tcpdump as you suggested and I'm seeing lots of the following
>> 15:53:08.372068 IP (tos 0x0, ttl 64, id 25688, offset 0, flags
>> proto: UDP (17), length: 57, bad cksum 0 (->ac3a)!) 10.10.0.4.58007 >
>> 10.10.86.10.53: [bad udp cksum 5042!] 46723+ AAAA?exchcluster. (29)
>> 15:53:08.372708 IP (tos 0x0, ttl 126, id 7951, offset 0, flags
>> proto: UDP (17), length: 57) 10.10.86.10.53 > 10.10.0.4.58007:
>> [udp sum
>> ok] 46723 ServFail q: AAAA? exchcluster. 0/0/0 (29)
>> I have assumed that sendmail on FreeBSD has sendmail's
>> WorkAroundBrokenAAAA option but this appears to either not be the
>> or the option fails to resolve the IP6 issue with W2K3 DNS servers.
>> At this point any and all suggestions (That do not involve
>> removing MS
>> DNS and/or Exchange) would be welcome.
> appears to spell out the issue. I'd suggest rebuilding sendmail
> as per..
> use the ports system to replace sendmail with a different MTA,
> my personal preference is postfix.
> Possibly, you could rebuild the resolver library with different
> as well. To be honest, I'm surprised this issue still exists over a
> - Mark
There's a line in /etc/mail/sendmail.cf, whose removal may work to
fix this case.
Try deleting the line with
O DaemonPortOptions=Name=IPv6, Family=inet6, Modifiers=O
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