Bug#530629: exim4: does not try every IP of some MXs

[Jeremy Harris]

On Tue, 26 May 2009 15:20:05 +0200 Lionel Elie Mamane <lionel at mamane.lu>
wrote:
> master at bagnat:~$ host a.mx.conuropsis.org
> a.mx.conuropsis.org has address 94.142.241.136
> a.mx.conuropsis.org has IPv6 address 2a02:898:36:612e:6d78::1
> 
> But Exim4 did not try 94.142.241.136:
> 
> 2009-05-26 15:02:19 Start queue run: pid=19212 -qf
> 2009-05-26 15:02:19 1M8wBu-0004z1-4C capsaicin.mamane.lu [2001:888:19f0:2:2e0:81ff:fe54:abf9] Network is unreachable
> 2009-05-26 15:02:19 1M8wBu-0004z1-4C tsomet.mamane.lu [2001:888:19f0:2::a] Network is unreachable
> 2009-05-26 15:02:19 1M8wBu-0004z1-4C tsomet.mamane.lu [2001:888:19f0::a] Network is unreachable
> 2009-05-26 15:05:28 1M8wBu-0004z1-4C tsomet.mamane.lu [82.95.233.223] Connection timed out
> 2009-05-26 15:05:28 1M8wBu-0004z1-4C a.mx.conuropsis.org [2a02:898:36:612e:6d78::1] Network is unreachable
> 2009-05-26 15:05:28 1M8wBu-0004z1-4C == lionel at mamane.lu R=dnslookup T=remote_smtp defer (101): Network is unreachable


The smtp transport option hosts_max_try has a
default value of 5.  I suspect the reporter ran into that;
it's intended behaviour and documented.
-- 
Jeremy