For those unfamiliar:
> Backscatter bounces are Non-Delivery Notifications, but they're for
> email you didn't send. A spammer sends out some of his spew with one
> or more of your addresses as the From, and poorly configured servers
> don't properly reject it, instead they send an NDN to the forged From
> address.
I'm trying to integrate SpamAssassin into my setup, but I accidentally
got myself on a couple blacklists because my setup was producing
backscatter. The relevant lines of my smtpd.conf:
listen on lo0 port 10026 tag SPAMCHECK
accept tagged SPAMCHECK for domain <domains> virtual <users> \
deliver to lmtp "/var/dovecot/lmtp" rcpt-to
accept from any for domain <domains> \
deliver to smtp://127.0.0.1:10025
and from rc.conf.local:
spampd_flags=--port=10025 --relayhost=127.0.0.1:10026
Without the relay to spampd, OpenSMTPD just sends back a 550 Invalid
recipient as it should, but when relaying to spampd, it sends a bounce
to the forged From address.
I've tried delivering via LMTP to spampd instead, but spampd's LMTP
support seems to be broken (I'm not sure it would fix the problem
anyway). I could filter only valid recipients through the initial relay,
but the table-sqlite manpage seems to indicate that there's no way to
set up a recipients table with sqlite.
Does anybody know how to fix this problem?
Thanks,
Simon
--
You received this mail because you are subscribed to [email protected]
To unsubscribe, send a mail to: [email protected]
