On Wed Nov 5 13:20:02 EST 2014, [email protected] wrote:
> Anthony Sorace <[email protected]> wrote:
> |> I've been looking through the documentation and
> |> the 9fans archive but I can't get a clear answer on
> |> what to replace localhost.localdomain with.
> |
> |If the recipient's mail server is being strict (but within
> |the bounds of the RFCs), that name is expected to be
> |the real, externally-resolvable DNS name of the
> |system you're sending from. The RFCs used to be more
> |lax on that point, and some servers still are, but you
> |shouldn't assume you'll be able to send to arbitrary
> |endpoints unless you satisfy that.
>
> gmail.com shouldn't care at all, so it must be his own SMTP server.
> (All i know in respect to this is Yandex.(ru|com), which requires
> that the hostname in the SMTP FROM:<> command _is_ a Yandex
> address, i.e., _no mismatch_ with _who_ you claim to be, which is
that's not what anthony claimed. he said that if you say
HELO example.com
that the following must be true
(a) dns return an a record for the query example.com, and
(b) the ip returned must have a ptr record pointing to example.com
(this is less enforced these days due to the difficulty of maintaining pointer
records.)
i think this is compatible with what you're saying. this doesn't make
sense to me. i don't do this:
> why i had to invent a *smtp-hostname* variable for the mailer
> i maintain in order to address the SMTP FROM:<> content directly:
perhaps you're conflating the envelope with the message?
- erik
