On 2023-02-28 at 13:31:13 UTC-0500 (Tue, 28 Feb 2023 18:31:13 +0000
(GMT))
Andrew C Aitchison via mailop <[email protected]>
is rumored to have said:
On Tue, 28 Feb 2023, Michael Peddemors via mailop wrote:
On 2023-02-28 08:00, Mark E. Jeftovic via mailop wrote:
Hey all,
Looks like customers trying to forward email from their own domains
here, to their O365 mailboxes are getting throttled with:
Stop 'remote forwarding'... simple..
Save you and your customers grief..
Is there an SMTP equivalent of the HTTP 30x status codes ?
No, because it is no sender's business whether my users have migrated to
GMail or MS365. :)
There is a reply code for 'moved' but I doubt that anyone outside of
academia and the last century has actually tried to make it useful. It
should not be made useful.
Such an option would achieve some of the purposes of forwarding
without re-sending spam, but would have privacy issues and allow
spammers to update their lists.
Serious considerations to balance,
Not really.
The privacy issue overrides any other consideration. Senders are
predominantly evil(*), so exposing private information to them is bad.
No one has figured out an authentication mechanism for SMTP senders
generally that works, much less a
trustworthy public reputation system for senders.
but is this option technically available ?
No. No mail system that replied with useful 551 responses could ever be
trusted.
(*) I have hard proof of this in my firewall and mail server logs.
Counter-arguments based on some senders being good can't refute them.
--
Bill Cole
[email protected] or [email protected]
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
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