Johnny Billquist <bqt%update.uu.se@localhost> writes:
On 2019-07-10 02:35, Greg Troxel wrote:
Mayuresh <mayuresh%acm.org@localhost> writes:
I have an smtp_header_check which adds Reply-To as the lists address
(quite contrary to yahoo's suggestion).
And contrary to IETF standards. Repent!
I know that there is always a debate about it, but I can't remember
seeing anything from IETF about it. Can you point me to that standard?
This post
http://marc.merlins.org/netrants/reply-to-still-harmful.html
references RFC 2822, saying:
In April of 2001, the IETF issued af new document, RFC 2822, which
obsoletes RFC 822. In this new RFC, the author addresses the Reply-To
header in a few places, but the most relevant to this discussion is
the following in section 3.6.2 "Originator fields":
When the "Reply-To:" field is present, it indicates the mailbox(es)
to which the author of the message suggests that replies be sent.
and indeed I can see that text at
https://www.ietf.org/rfc/rfc2822.txt
Also, RFC2822 contains
In all cases, the "From:" field SHOULD NOT contain any mailbox that
does not belong to the author(s) of the message. See also section
3.6.3 for more information on forming the destination addresses for a
reply.
which, while it is SHOULD NOT, not MUST NOT, speaks against yahoo's
scheme of setting the From: field to the list address. There are
sometimes debates about whether mailing lists are forming new messages
from the original message, but this says "author" instead of "sender", a
nuance I had not previously noticed.