"Strange" maillog entries - am I being used as a relay?
Mike Pelley
mike at pelleys.com
Sat Apr 2 12:05:08 UTC 2005
Folks - I noticed some strange errors in my logwatch report and when I
checked my maillog I found the entries below. I have SMTPS with TLS set
up for authentication. Does this mean I'm being used as a relay?
maillog:Mar 29 09:30:24 zeus postfix/smtpd[26863]: connect from
unknown[216.113.195.131]
maillog:Mar 29 09:30:24 zeus postfix/smtpd[26863]: setting up TLS
connection from unknown[216.113.195.131]
maillog:Mar 29 09:30:24 zeus postfix/smtpd[26863]: TLS connection
established from unknown[216.113.195.131]: TLSv1 with cipher
DHE-RSA-AES256-SHA (256/256 bits)
maillog:Mar 29 09:30:25 zeus postfix/smtpd[26863]: 0A1267031D:
client=unknown[216.113.195.131]
maillog:Mar 29 09:30:25 zeus postfix/smtpd[26863]: 0A1267031D: reject:
RCPT from unknown[216.113.195.131]: 450 <internal user>: User unknown in
local recipient table; from=<> to=<internal User> proto=ESMTP
helo=<email.noproblemnetworks.com>
maillog:Mar 29 09:30:27 zeus postfix/smtpd[26863]: disconnect from
unknown[216.113.195.131]
Thanks,
Mike
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