Internal sendmail problems

[Mark Blackman]

On 2 Jan 2008, at 16:15, O'Connor, Kevin wrote:

> Mark,
>
> 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  
> [none],
> 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 [none],
> 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 case
> 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.

http://zaib.as/node/8

appears to spell out the issue. I'd suggest rebuilding sendmail
as per..

http://unix.derkeiler.com/Mailing-Lists/FreeBSD/questions/2006-07/ 
msg01020.html

*OR*

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 options
as well. To be honest, I'm surprised this issue still exists over a year
later.

- Mark

>
> Regards
> Kevin
>
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