the diagnostic code: smtp:554 the mail could not be deliveredto recipient because the domin is not reachable (1479978268:301:/2147467259)

11. October 2013 · Write a comment · Categories: Hotmail, Outlook.com · Tags: ,
Senders to my email receive the following:
Delivery to the following recipients failed
 the diagnostic code: smtp:554 the mail could not be deliveredto recipient because the domin is not reachable (1479978268:301:/2147467259)