Hi Brian,
At 06:44 AM 24-01-2020, Sara Dickinson wrote:
Thanks to Brian for his explanation on this point which I agree with.
Thanks, I see an explanation at
https://mailarchive.ietf.org/arch/msg/dns-privacy/tr6ZNtxgScyDWwwyy3pUIpJxmY0
I used the word "validation" as it would be generally understood in
(IETF) discussions about mail protocols. From a DNS perspective, it
would be a DNS query. Mail User Agents (MUA) generally do not
perform DNS queries on the domain part of an email address. The only
exception I can think of is "direct-to-MX". It is unlikely that
sending an email directly to a mail server (identified by the MX RR)
would work as outgoing TCP port 25 is usually blocked by Internet
Service Providers. In terms of IETF specification, the MUA sumbits
email to a MSA (RFC 6409). The DNS queries are intended to be
performed by the MSA (not the MUA).
In my opinion, the case made in the second paragraph of Section 3.2
does not match how the code works on the Internet. I prefer to move
on instead of pushing back on this issue as I spent more than enough
effort on it.
For what it is worth, I preferred not to get into a discussion about
the Introduction section of the draft. If I am ever asked about the
text, I will say that I disagreed with it as it is like looking down
on Internet users ...
Regards,
S. Moonesamy
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