Nicholas J Humfrey wrote:
Hello,
I have just upgrade to Squeeze and this was a problem for me on my machine too.
Symtoms were:
Dec 30 02:02:19 hadrian courierd: newmsg,id=0008C03A.4B3AB4AB.00003408,
auth=njh: dns; [10.0.0.60] (softdnserr [::ffff:82.152.145.11])
Dec 30 02:02:19 hadrian courierd:
started,id=0008C03A.4B3AB4AB.00003408,from=<n...@aelius.com>,module=esmtp,host=ecs.soton.ac.uk,addr=<n...@ecs.soton.ac.uk>
Dec 30 02:02:19 hadrian courierd: Waiting. shutdown time=none, wakeup
time=none, queuedelivering=1, inprogress=1
Dec 30 02:02:19 hadrian courieresmtp:
id=0008C03A.4B3AB4AB.00003408,from=<n...@aelius.com>,addr=<n...@ecs.soton.ac.uk>:
DNS lookup failed.
Dec 30 02:02:19 hadrian courieresmtp:
id=0008C03A.4B3AB4AB.00003408,from=<n...@aelius.com>,addr=<n...@ecs.soton.ac.uk>,status:
deferred
Dec 30 02:02:19 hadrian courierd: completed,id=0008C03A.4B3AB4AB.00003408
Testing MX lookup was failing:
$ testmxlookup ecs.soton.ac.uk
Soft error.
My solution to the problem was to edit /etc/sysctl.d/bindv6only.conf and set
net.ipv6.bindv6only = 0.
OK, I can confirm this problem. Just for the records: run /etc/init.d/procps
restart in order
to apply the changes in /etc/sysctl.d/bindv6only.conf to your system.
Regards
Racke
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