15 pts.
 Delivery Failure error 553
We have recently switched to a new ISP and a new firewall. I am not able to send emails to one person. This is the error message, I am getting "Error transferring to cluster9.us.messagelabs.COM; SMTP Protocol Returned a Permanent Error 553 http://www.mail-abuse.com/enduserinfo.html" How can I resolve this?

Software/Hardware used:
ASKED: July 29, 2009  6:23 PM
UPDATED: July 29, 2009  8:05 PM

Answer Wiki:
It seems that the server ip address is black-listed. You need to contact you ISP to resolve this. You can get more help by visiting the page mentioned in the bounce message. ------------- Also, ask the receiving organization to whitelist your domain/IP address.
Last Wiki Answer Submitted:  July 29, 2009  6:46 pm  by  carlosdl   63,535 pts.
All Answer Wiki Contributors:  carlosdl   63,535 pts.
To see all answers submitted to the Answer Wiki: View Answer History.


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Thank you. I have verified that we are one one black list. I’ve requested to be removed.

 15 pts.