I have an issue which I am not sure how to fix. A client of ours can not send emails to us as she is
getting the failure message below. I can not see that our exchange server IP 220.127.116.11 Blackisted, however is it possible
our exchange is blocking her IP?
This message was created automatically by mail delivery software.
message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following
SMTP error from remote mail server after RCPT TO::
host mail.synergyit.co.uk [18.104.22.168]: 550 5.7.1 Recipient not authorized, your IP has been found on a block list
------ This is a copy of the message, including all the headers. ------
by smarthost02.mail.zen.net.uk with smtp (Exim 4.63)
for Trevor.Jones@SynergyIt.co.uk; Thu, 03 Dec 2009 16:26:38 +0000
To: "Trevor Jones"
Date: Thu, 3 Dec 2009 16:26:29 -0000
X-Mailer: Microsoft Outlook Express 6.00.2900.5843
By Microsoft MimeOLE V6.00.2900.5579
This is a multi-part message in MIME format.