Host Unknown

----- The following addresses had permanent fatal errors -----
<JDOE@YOURDOMAIN.COM>

----- Transcript of session follows -----
550 5.1.2 <JDOE@YOURDOMAIN.COM>... Host unknown (Name server:
mail.yourdomain.com.: host not found)

This means that our mail server was not able to locate the mail server for switchgrass.net (mail.yourdomain.com) in the Internet's domain name service (DNS). If the target system can't be found in the DNS, then our mail server can't connect to the remote mail server to deliver your message.

Most "host unknown" errors are caused by a typo in the domain name part of the intended recipient's address, but an increasing number of "host unknown" errors are the result of trying to reply to junk mail (spam). This is because the "From:" address on junk mail is almost always bogus. Where the address is typed correctly and is a real one, the problem is usually a temporary failure in DNS.

What you should do:

Confirm the intended recipient's address, if possible. Resend your message to the corrected address.

We accept: