DNS warnings in masscheck output

[Tom Hendrikx <to...@whyscream.net>]

Hi,

For some runs of masscheck, I get extra output in the form of failed dns
queries. This happens about once every week. The messages triggering
these lines are in my ham corpus. The weird thing is that the messages
are used in every masscheck run, but the errors don't occur every day,
and the double dot that is reported is not actually in the message.

Any idea?

status: starting scan stage                              now: 2017-03-11
10:00:25 AM
status: completed scan stage, 2902 messages              now: 2017-03-11
10:00:26 AM
status: starting run stage                               now: 2017-03-11
10:00:26 AM
dns: new_dns_packet (domain=www.bol..com. type=A class=IN) failed: a
domain name contains a null label
dns: new_dns_packet (domain=www..bol.com. type=A class=IN) failed: a
domain name contains a null label
dns: new_dns_packet (domain=clicks.fanbridge..com. type=A class=IN)
failed: a domain name contains a null label
dns: new_dns_packet (domain=www.bol..com. type=A class=IN) failed: a
domain name contains a null label
dns: new_dns_packet (domain=www.bol..com. type=A class=IN) failed: a
domain name contains a null label
dns: new_dns_packet (domain=www.bol..com. type=A class=IN) failed: a
domain name contains a null label
dns: new_dns_packet (domain=www.bol..com. type=A class=IN) failed: a
domain name contains a null label
status:  10% ham: 237    spam: 54     date: 2012-05-01   now: 2017-03-11
10:05:42 AM
status:  20% ham: 477    spam: 105    date: 2013-06-04   now: 2017-03-11
10:10:38 AM
status:  30% ham: 715    spam: 158    date: 2014-01-06   now: 2017-03-11
10:15:50 AM
dns: new_dns_packet (domain=. type=A class=IN) failed: a domain name
contains a null label
status:  40% ham: 955    spam: 209    date: 2014-08-11   now: 2017-03-11
10:20:46 AM
dns: new_dns_packet (domain=. type=A class=IN) failed: a domain name
contains a null label
dns: new_dns_packet (domain=. type=A class=IN) failed: a domain name
contains a null label
status:  50% ham: 1194   spam: 261    date: 2015-02-17   now: 2017-03-11
10:26:03 AM
status:  60% ham: 1431   spam: 315    date: 2015-09-14   now: 2017-03-11
10:31:10 AM
status:  70% ham: 1669   spam: 368    date: 2016-03-15   now: 2017-03-11
10:36:08 AM
status:  80% ham: 1905   spam: 423    date: 2016-07-20   now: 2017-03-11
10:41:06 AM
status:  90% ham: 2141   spam: 478    date: 2017-03-04   now: 2017-03-11
10:46:10 AM
status: completed run stage                              now: 2017-03-11
10:49:36 AM