Undeliverable e-mail

[Kendriga]

I am getting e-mail returned undeliverable saying "The following recipient
could not be reached: '(e-mail address removed)' on (date & time) 450 4.1.8
- Domain of recipient does not resolve [R0309001]."

I am sending an e-mail from home to my work e-mail account (which I have
done many times before) but now all e-mails sent from my home to work return
undeliverable. The send and receive function on both e-mail addresses works
fine except when trying to communicate between the two. Can you help?

 

[VanguardLH]

I am getting e-mail returned undeliverable saying "The following recipient
could not be reached: '(e-mail address removed)' on (date & time) 450 4.1.8
- Domain of recipient does not resolve [R0309001]."

I am sending an e-mail from home to my work e-mail account (which I have
done many times before) but now all e-mails sent from my home to work return
undeliverable. The send and receive function on both e-mail addresses works
fine except when trying to communicate between the two. Can you help?

It means domain xx.xxxx.xxx is not known to whomever is your e-mail
provider. What do you get in a command shell when you run:

nslookup xx.xxxx.xxx