25 Jul
2016
25 Jul
'16
4:46 a.m.
mån 2016-07-25 klockan 01:33 +0000 skrev Andy Smith:
Hi,
For about the 5th time in the last 6 months, Spamhaus has listed the
IPv6 address of our support ticket mail host as a spam source.
I have checked every outbound port 25 connection from that host and
verified that the only thing it sends is replies to support tickets.
The previous times this happened I was able to de-list the host, but
this time:
https://www.spamhaus.org/query/ip/2600%253A3c03%253A%253A31%253A2000
just says "invalid input.", so I can't de-list it this time.
Seeing the same "invalid input" for any IPv6 address I try inputing
there, so I guess that would be a (temporary?) glitch on their site.
Anyway.
$ dig +short
0.0.0.2.1.3.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.c.3.0.0.6.2.zen.spamhau…
127.0.0.3
$
That would be the https://www.spamhaus.org/css/ list.
Based on some additional test lookups, it does indeed appear as if the
block is for the full 2600:3c03::/64 range.
How big your Linode IPv6 pool? Any chance that you are getting blocked
by what some other Linode customer is doing?
// Andreas