It hasn't risen to the level of DDOS, yet, but I'm getting many
hundreds of these messages per night (and it is now continuing during
They look like this:
Hi. This is the qmail-send program at purgatoire.org.
I tried to deliver a bounce message to this address, but the bounce bounced!
18.104.22.168 does not like recipient.
Remote host said: 550 5.1.1<lvadvc...@telcom.es>: Recipient address rejected:
Giving up on 22.214.171.124.
--- Below this line is the original bounce.
... each one with totally unrelated email and IP addresses and with variable
sizes and all in MIME format.
I use FreeBSD here. Running qmail in a jail. I do use ssmtp running on the
host (not jailed) in order to get the periodic daily/weekly/monthly reports.
Is someone somehow using my system to try to send spam?
Any idea how to block this?
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