Re: [mailop] Should mail servers publish IPv6 MX records? Could this harm your spam filtering?

2018-06-09 Thread Matthias Leisi
> Isn't the simplest way to handle this is to treat IPv6 at the /64 or smaller > level? There is no broad consensus yet on where IPv6 reputation should be attached to. Cheap hosting providers handing out individual /128s to customers… Discovery protocols to find the „right“ prefix length to q

Re: [mailop] Should mail servers publish IPv6 MX records? Could this harm your spam filtering?

2018-06-09 Thread Matthias Leisi
> If the industry had moved to a reputation model, it would be easier to > discuss "how bad is it" and whether it's bad enough to block at IP time, or > whether you mix it into your spam score. Isn’t this what postscreen_dnsbl_sites is doing, for example? > Will SMTP be the last hold-out on IP

Re: [mailop] Should mail servers publish IPv6 MX records? Could this harm your spam filtering?

2018-06-09 Thread Andrew C Aitchison
On Wed, 6 Jun 2018, Rob McEwen wrote: Here is an article I posted on Linkedin about spam filtering IPv6-sent email. "Should mail servers publish IPv6 MX records? Could this harm your spam filtering?" https://www.linkedin.com/pulse/should-mail-servers-publish-ipv6-mx-records-rob-mcewen/ Th

Re: [mailop] Should mail servers publish IPv6 MX records? Could this harm your spam filtering?

2018-06-09 Thread Stefano Bagnara
On Sat, 9 Jun 2018 at 17:36, Andrew C Aitchison wrote: > I'm curious. > If a domain has no MX record, do all servers deliver to an record, > as required by (at least) RFC3974, required? "This memo provides information for the Internet community. It does not specify an Internet standard of an

[mailop] Sending mail to t-mobile.com

2018-06-09 Thread Florian Weimer
Is it expected that it is possible for the Internet at large to send email to t-mobile.com addresses? It looks like they have some far-ranging network blocks for some reason, at the TCP/IP level (connection attempts time out). I haven't seen any public unblocking instructions, and the usual unblo

Re: [mailop] Should mail servers publish IPv6 MX records? Could this harm your spam filtering?

2018-06-09 Thread Mal via mailop
On 10/06/2018 3:16 AM, Stefano Bagnara wrote: > On Sat, 9 Jun 2018 at 17:36, Andrew C Aitchison > wrote: >> I'm curious. >> If a domain has no MX record, do all servers deliver to an record, >> as required by (at least) RFC3974, You'd expect, No MX record, no mail delivery. MX is related