Reason: 5.1.1 <firstname.lastname@example.org>: Recipient address rejected: mail
for example.com is not deliverable
Sorry. Your message could not be delivered to:
(could not contact host after 4 attempt(s))
Hi. This is the qmail-send program at yahoo.com.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
216.183.x.x failed after I sent the message.
Remote host said: 421 mail.example.ca Error: timeout exceeded I'm not going to try again; this message has been in the queue too long.