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Date:      Thu, 11 Mar 2004 13:42:56 +0200
From:      "Gareth Bailey" <freebsd@xiplan.com>
To:        "FreeBSD - questions" <freebsd-questions@freebsd.org>
Subject:   Reverse DNS - mail error
Message-ID:  <010001c4075e$00fd0a40$0500a8c0@BAILEY>

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My postfix seems to be running just fine, but i recently had a problem =
sending mail to a particular address. The message sent to me, the =
postmaster, was:

host <IP Number>
    said: The server sending your mail [<IP Number>] does not have a
    reverse DNS entry. Connection Rejected. Please contact your
    Dial-Up/DSL/Network ISP Provider. Default Reject! (in reply to end =
of DATA
    command)

What does this mean and what do i need to do?
Any info will be much appreciated

Thanks
Gareth



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