[lug] OT: Dealing with Unreliable Mail/DNS Servers

[George Sexton]

Unfortunately, it appears this is a compile-time option set in SendMail.


-----Original Message-----
From: lug-bounces at lug.boulder.co.us
[mailto:lug-bounces at lug.boulder.co.us] On Behalf Of Nate Duehr
Sent: Tuesday, January 06, 2004 8:10 PM
To: Boulder (Colorado) Linux Users Group -- General Mailing List
Subject: Re: [lug] OT: Dealing with Unreliable Mail/DNS Servers



On Tuesday, Jan 6, 2004, at 15:06 America/Denver, George Sexton wrote:

> The problem appears to be that I was getting an authoritative NXDOMAIN
> response. I think I found the workaround.
>
> The problem was sendmail first makes a AAAA DNS request. Certain
broken
> DNS servers incorrectly return a SERVFAIL or NXDOMAIN response rather
> than the correct response of "No Records". For sendmail, the
workaround
> appears to be to add a magic
>
> define(`confBIND_OPTS',`WorkAroundBrokenAAAA')
>
> entry into the .mc file and re-generate the .cf file using M4.

George, do you have an IPv6 address on that box?

If not, wouldn't completely disabling the AAAA lookups altogether save 
a step or two on all mail deliveries?

--
Nate Duehr, nate at natetech.com

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