23 Sep
2017
23 Sep
'17
6:27 p.m.
On 2017-09-23 16:57, Tom Ivar Helbekkmo wrote:
Why should anyone need to? Of all the mailing lists
I'm on, this one
is the only one that has this problem. For instance, on the NetBSD
mailing lists, my email reaches other recipients "From:" my real email
address, and SPF, DKIM, and DMARC all check out clean. Here are the
headers from a message I sent to a NetBSD list, as received by my own
system (whereas the message I sent to the TUHS list last night was
refused by my MTA):
Probably because the NetBSD list, unlike the tuhs list and most others,
doesn't mess with the headers or body in any way - not by attaching a
"helpful" tag to the Subject, and not by appending an xtra fake sig with
unsubscription info.
Either of these "modern" paractices will invalidate the source DKIM
signature, and so also trigger a DMARC reject if a strict policy is set.
By the way, my inbound processing automatically strips the Subject tag
before I get to see the messages. It is useless.
--
Please don't Cc: me privately on mailing lists and Usenet,
if you also post the followup to the list or newsgroup.
Do obvious transformation on domain to reply privately _only_ on Usenet.