Do we really want to be discussing changes to this draft on the main
IETF list?
S Moonesamy wrote:
In Section 8:
"If the RFC5322.From domain does not exist in the DNS, Mail Receivers
SHOULD direct the receiving SMTP server to reject the message."
Why is there such a recommendation? What is a mail receiver? I am
asking the question as there is "receiving SMTP server" in that sentence.
That would be silly. RFC5322.From might contain no DNS domain to begin with.
It has to contain a domain. If it doesn't it's syntactically invalid. Here's
the relevant ABNF:
from = "From:" mailbox-list CRLF
mailbox-list = (mailbox *("," mailbox)) / obs-mbox-list
obs-mbox-list = *([CFWS] ",") mailbox *("," [mailbox / CFWS])
mailbox = name-addr / addr-spec
name-addr = [display-name] angle-addr
angle-addr = [CFWS] "<" addr-spec ">" [CFWS] / obs-angle-addr
obs-angle-addr = [CFWS] "<" obs-route addr-spec ">" [CFWS]
addr-spec = local-part "@" domain
There's no way through that doesn't include at least one addr-space, which in
turn contains a domain.
In Section 10.1:
"Have no RFC5322.From field (which is also forbidden under RFC 5322
[MAIL])"
Where is it stated in RFC 5322 that it is forbidden? That RFC
specifies a syntax for the Internet Message Format.
See the table in section 3.6. It says that the minimum number of from fields
in the header is 1.
Some MTAs (sendmail?) seem to recreate an RFC5322.From from the Envelope,
in case that it is missing in the message.
Indeed they do. It's a reasonable action to take on message submission.
Relay is more ... interesting.
Ned