Mail Delivery Status Notification (Delay)

Mail Delivery Status Notification (Delay)

Lately I am getting this error frequently especially with one customer, ;

This message was created automatically by mail delivery system.

 

THIS IS A WARNING MESSAGE ONLY.

 

YOU DO NOT NEED TO RESEND YOUR MESSAGE.

 

The original message was received at  XX Jan 2020 23:30:03 -0800  from myaddress@myaddress.com

 

    ----- The following addresses had fatal errors -----   

   [Status: Error, Address: <reciever@recieveraddress>, ResponseCode 421, Host not reachable.]

 

Message will be retried for 4 more day(s)