In the part 4 (external submission), the document offers no recommendation
concerning the blocking of SMTP port 25.
Even if the ISP decides not to block it, this ISP should be covered by
this future RFC to legitimate its choice of closing port 25.(a single MAY
can be enough)
Unfortunately, blocking port 25 is controversial. The goal of the current draft
is to specify procedures that are well-accepted.
So we decided to cite the existence of port 25 blocking -- just so no one
thought we missed it -- but to have the document explicitly abstain from taking
a position.
If we try to add text that legitimizes port 25 blocking, we are certain
to get extensive debate that will not result in rough consensus. I say
this with such certitude because the issue has been debated in a variety
of forums repeatedly.
d/
---
Dave Crocker
Brandenburg InternetWorking
+1.408.246.8253
dcrocker a t ...
WE'VE MOVED to: www.bbiw.net
_______________________________________________
Ietf mailing list
Ietf(_at_)ietf(_dot_)org
https://www1.ietf.org/mailman/listinfo/ietf