I wonder if it would ever work to allow a server to forward a message
while including headers that indicate the message had signs of spam. It
would only work in the negative direction (this message is spam, but not
this message is ham).
I kind of think of in the way the courts do with declarations against
interest. They're admissible because the statement is so prejudicial,
no one would make it falsely. Likewise, no sender would have an
interest in sending an email with spam headers attached, so they had to
have been truthfully added by a forwarding server.
--Ted
On 11/8/2017 11:46 AM, Brandon Long via mailop wrote:
GSuite users can also denote a host as an inbound gateway to get around
this problem, but I was never able to get the resources to have gmail
users have the same ability. It's possible this is something we could
use arc for.
Brandon
On Wed, Nov 8, 2017 at 11:41 AM Alan Hodgson <ahodg...@lists.simkin.ca
<mailto:ahodg...@lists.simkin.ca>> wrote:
On Wed, 2017-11-08 at 12:20 -0700, Warren Volz wrote:
All,
One of my users has their account setup to forward mail to Gmail.
Recently I've started to see lots of rejects that look like the
following:
<us...@gmail.com <mailto:us...@gmail.com>> (expanded from
<us...@somelocaldomain.net <mailto:us...@somelocaldomain.net>>): host
gmail-smtp-in.l.google.com
<http://gmail-smtp-in.l.google.com>[2607:f8b0:400e:c04::1a] said:
550-5.7.1
[ipv6 address 18] Our system has detected that
550-5.7.1 this message is likely suspicious due to the very low
reputation
of 550-5.7.1 the sending IP address. To best protect our users
from spam,
the 550-5.7.1 message has been blocked. Please visit 550 5.7.1
https://support.google.com/mail/answer/188131 for more information.
p26si2014836pli.781 - gsmtp (in reply to end of DATA command)
I've looked over the forwarding best practices provided by google
and we are not modifying the envelope sender. I'd rather not start
throwing away what our filter marks as spam since I leave that up
to the user, but is that the only way to stop the bounces? Also,
is the "18]" an artifact or some kind of error?
Thanks for the help.
IMO, you really can't forward mail to Gmail; they will block you if
you forward any spam at all.
Gmail accounts can be setup to pull mail in via POP-3, that's a far
better way for them to get their mail.
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