Ron Garret:
I have recently come under a backscatter spam attack from one
specific domain. This domain has blacklisted my server?s IP
address, and so bounce replies sent to this domain are piling up
in my mail queue and I have to go through periodically and manually
delete them. I don?t want to disable bounce messages in general
because I don?t want incoming messages with typos in the destination
address to just vanish into the cosmic void. Is there a way to
disable bounce replies for a specific domain?
On Jul 11, 2021, at 9:58 AM, Wietse Venema <wie...@porcupine.org> wrote:
Why is your server sending bounces (or any other email) to that
domain?
Ron Garret:
Because spammers are sending messages with forged return-path headers to
invalid addresses on my server. It?s called backscatter:
On Jul 11, 2021, at 10:12 AM, Wietse Venema <wie...@porcupine.org> wrote:
You must reject mail for invalid recipient addresses. Otherwise,
you deserve by 100% the problem that you experience.
On 11.07.21 11:35, Ron Garret wrote:
AFAIK, I am:
smtpd_recipient_restrictions =
reject_unauth_pipelining,
reject_non_fqdn_recipient,
reject_unknown_recipient_domain,
permit_mynetworks,
permit_sasl_authenticated,
reject_unauth_destination,
try adding "reject_unlisted_recipient", although
smtpd_reject_unlisted_recipient=yes (default) shoult take care of that.
permit
The problem is that a rejected recipient produces a mailer-daemon reply.
only if you accept mail for such recipient.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
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