On 2006, Oct 6, at 04:02, Wojciech Puchar wrote:
one of my users reporting problem sending e-mail to @mil.be
sendmail reports host name lookup failure
host reports
[EMAIL PROTECTED] ~]$ host -t mx mil.be
mil.be mail is handled by 10 hermes01.mil.be.
[EMAIL PROTECTED] ~]$ host -t a hermes01.mil.be
hermes01.mil.be has address 194.7.21.40
hermes01.mil.be has address 193.191.219.40
Host hermes01.mil.be not found: 2(SERVFAIL)
^^^^^^^^^^^^^
where's a problem? while hostr is able to get IP addresses but then
reports servfail?
What you are seeing is the IPv6 AAAA lookup:
# host -t aaaa hermes01.mil.be
Host hermes01.mil.be not found: 2(SERVFAIL)
Make sure you have the Sendmail option turned on to ignore the
SERVFAIL messages:
# grep AAAA /etc/mail/freebsd.mc
define(`confBIND_OPTS', `WorkAroundBrokenAAAA')
# grep AAAA /etc/mail/sendmail.cf
O ResolverOptions=WorkAroundBrokenAAAA
With that, mail should flow fine.
Though I have to admit I am having a similar problem except the host
is randomly (with a very high probability of it doing so) failing to
respond at all rather than at least answering SERVFAIL. With no
SERVFAIL it appears Sendmail/resolver consider the NS host to be down
and do not fail through to try and lookup the A record. [I'm still
trying to verify that.]
-philip
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