BounceBacks from specific domain

BounceBacks from specific domain

Hi, 

I am trying to reach a client and receive an immediate deny. 

"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.

 

user@domain.com Error, ERROR_CODE :550, ERROR_CODE :5.7.1 There was a problem delivering your email. Please contact help@domain2.com and include \"ID 74.201.84.163\" in the message.

"

Is the message above my issue or should I contact the help@domain2.com


Thank you.