Hi David,
From the partial smtpserver log you showed I wonder if the spammer is
simply trying to send a message containing lots of RCPT commands. If
that's the case then turning on tarpitting [1] may help to regulate
how quickly the spammer can stuff your machine.
That would probably reduce the problem, but I am more interested in
actually solving it. James shouldn't accept the mails at all without
authentification, since the RCPT list doesn't contain any local addresses.
Tor
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