mail filter log

Posted by Pierce in BolehLand, Living, Technology Rant | Tagged | 1 Comment

mystery mail filter log entry captured

Jan 29 21:56:01 mail.tx postfix/smtpd[15704]: NOQUEUE:
reject: RCPT from unknown[]: 554 5.7.1
Service unavailable; Client host [] blocked
using xbl; Blocked maxcount hit; from=
<> to=<c@✱✱✱✱✱✱✱✱✱.net>
proto=SMTP helo=<najib1>; PTR unknown[]
resolved by[]

I wonder what are they doing looking for that invalid email address on my mail server and is this enough to show malice intend?

**Reader discretion is advised