On 9/24/14, Tim Chown <t...@ecs.soton.ac.uk> wrote: > The IPv4 rep for the same MTA is Good. > > http://www.senderbase.org/lookup/?search_string=152.78.0.0/16 > > Would be interesting to see why the IPv6 rep would be different. Spam from > that MTA would presumably go out over whichever protocol was available. > Perhaps because there’s a much smaller sample size on IPv6 (maybe 3% of our > outbound is IPv6 last time I looked) it’s more susceptible to a small amount > of email that’s deemed spam. > > Anyway, thanks :) >
np, looks like you should have something in your inbox now to take a look at on your end... --a p.s. unrelated data point: sent myself an email from this account, it came over IPv6 with no issues, here's some pudding to prove :-) : Received: from mail-ig0-x231.google.com ([IPv6:2607:f8b0:4001:c05::231]) by alln-inbound-m.cisco.com with ESMTP/TLS/RC4-SHA; 24 Sep 2014 14:49:23 +0000 > Tim > > On 24 Sep 2014, at 13:41, Andrew 👽 Yourtchenko <ayour...@gmail.com> wrote: > >> Tim, >> >> Roger that! >> >> We're checking internally what's going on. >> >> Changing just one nibble in the host portion of the address makes >> SenderBase score "neutral", so something must be up for that >> particular /128. >> >> When I learn more, will ping you. >> >> --a >> >> >> On 9/24/14, Tim Chown <t...@ecs.soton.ac.uk> wrote: >>> My emails to Cisco people are now bouncing. >>> >>> It seems the cause is a poor rep on one of our MTAs: >>> http://www.senderbase.org/lookup/?search_string=2001%3A630%3Ad0%3Af102%3A%3A25e >>> The DNS reverse seems fine for falcon.ecs.soton.ac.uk >>> >>> But the email bounce (with username deleted) says: >>> >>> Final-Recipient: RFC822; xxxxxxx...@cisco.com >>> Action: failed >>> Status: 5.1.1 >>> Remote-MTA: DNS; alln-mx-01.cisco.com >>> Diagnostic-Code: SMTP; 550 Connections from the host >>> falcon.ecs.soton.ac.uk >>> (2001:630:d0:f102::25e), originating from SenderBase Network Owner ID: >>> None, >>> are being rejected due to a low SenderBase Reputation Score. See >>> http://www.senderbase.org for more information or contact your IT >>> support >>> team. >>> >>> If any Cisco people are on this list, please have someone have a look. I >>> think Andrew Yourtchenko is, and he is one person with bounces. >>> >>> Tim >>> >>> > >