Exchange 2010, Error 4220.127.116.11 Primary Target IP Address responded with 518.104.22.168
Posted on 2013-12-10
I have a client running SBS2011 with exchange 2010.
When they send to one particular email address the message stay in the queue viewer with the following error "422.214.171.124 Primary Target IP Address responded with "5126.96.36.199 Dynamic IP Addresses are blocked. Please contact your email provider"
I have search the web but cannot find this exact error. Can anyone advise what this error is caused by.
Thanks and kind rergards,