Internal sendmail problems

Mark Blackman mark at blackmans.org
Thu Jan 3 09:50:29 GMT 2008


On 2 Jan 2008, at 18:08, O'Connor, Kevin wrote:

> >The correct solution is to fix the broken DNS server that is
> >returning ServFail instead of NXDOMAIN on AAAA lookups.  IPv6 RFCs
> >have been published for about 15 years so it's a sign of very
> >shoddy resolver software if it can't DTRT as of this late date.
>
> Matthew,
>
> That just sounds like a polite way of saying "Throw the MS DNS in  
> the bin" which is sadly not an option.
> I'll stick with my kludge of using an alias as a relay for all mail  
> so that sendmail does not need to query DNS.
>
I *think* the resolver code/server bug is only tripped if sendmail  
thinks it
can do inet6 and I suspect there's more than one way to persuade  
sendmail
not to think about inet6.

* recompile sendmail with WITHOUT_INET6
* possibly the uncommenting mentioned, but that's a long shot
* deleting any ipv6 addresses on your interfaces

your alias approach may mean less overall work though.

- Mark
>
>
> BIND has a nightmare time synchronising zones from MS DNS due to  
> the non-standard record types they stick in the file so I'm not  
> sure running a local DNS server would not cause me more problems  
> than I have now.
>
> Server 2008 is RTM in March and it has IPv6 built into the GUI so  
> I'll wait and see if their new improved DNS sorts it.
>
> Thanks to all for the suggestions and pointers
>
> Kevin
>
>
>
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