SMTP Over TLS on Port 26 - Implicit TLS Proposal [Feedback Request]

Sat Jan 12 02:00:14 UTC 2019

On Fri, Jan 11, 2019 at 5:52 PM Viruthagiri Thirumavalavan
<giri at dombox.org> wrote:
>> In addition, it bypasses all the security folks have built around the
>> idea of blocking port 25 traffic from sources which should not be
>> operating as mail servers. Let's not make the network less secure in
>> the name of making it more so.
>
> I already addressed this issue in the "security considerations" section.
>
> "Port 26 will be a secure alternative for Port 25. So Internet Service Providers are adviced to take precautions to prevent email spam abuse. They are advised to block port 26, if necessary."

While we're at it, let's deprecate IPv4 now that IPv6 is fully deployed.

-Bill

-- 
William Herrin ................ herrin at dirtside.com  bill at herrin.us
Dirtside Systems ......... Web: <http://www.dirtside.com/>