On Tue, Aug 19, 2025 at 03:09:47PM +0200, Benoit Panizzon via mailop wrote:
> Reply "Case got opened" confirmation is being sent back to the
> attackers account and forwarded to all other support addresses to which
> this is forwarded, those in turn again reply with "Case got opened"
> effectively DOSing the whole list until either some rate limiting at
> the freemail operator blocks the thing or everyone manages to set up
> filter for all forwarded email. Blocking IP is useless as those
> freemailer keep changing the IP and love to use those which cause the
> most collateral damage with real customers when blocked.
So both sides forgot to implement the twenty years old RFC 3834. No
auto reply ought to be generated for automatically generated e-mail.
And you mean Google Groups? This you can block easily.
Bastian
--
You can't evaluate a man by logic alone.
-- McCoy, "I, Mudd", stardate 4513.3
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