What is 550 No such domain error bounceback?

[Alex Bell]

Using Outlook 2003, I recently replied to a known email address, but received
this error bounceback instead: "550 (e-mail address removed) no such domain".
Can you please tell me what this means? Why did it occur? How can I prevent
it from occurring again?
Thank you so much.

 

[neo [mvp outlook]]

It means that when the sending e-mail server went to search DNS for MX/Host
record for "huatai-ser.com" that it came back that it doesn't exist. Since
the receiving domain doesn't exist, sending mail server can't deliver the
message to the recipient server so it does a permanent fail and returns the
item back to sender with error text and why.

Nothing you can do from the senders point of view. All corrections must be
made by the recipient's mail system caretakers.

 

[Alex Bell]

Thank you so much for the quick response. I am somewhat intrigued because I
could not send the email to the address, but on the advice of a friend I sent
the message again the next day, and it went through successfully. The
question is how can I be sure this message has actually reached the
recipient. (there is no other method of communication but email).
Secondly, why would their server return a permanent fail considering we were
communicating via email only the previous day, using the same email address.
Many thanks.
Alex Bell

 

[neo [mvp outlook]]

Based on what you are describing, sounds like an intermittent DNS issue.