Blacklist Zoho 74.201.84.163

Hello,

I get this error message after sending mail to out important client.

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error.

Invalid Address, ERROR_CODE :550, ERROR_CODE :Rejected message because 74.201.84.163 is in a black list at dnsbl.sorbs.net

I read about problem with zoho mail IP address and blacklist, can you suggest what to do?

It is very important to solve this problem as soon as possible.

Thank you,

Best regards,

Mijo