Sender Domain Not Found

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

----- Transcript of session follows -----
... while talking to b.mx.aol.com.:
>>> MAIL From:<JDOE@YOUDROMAIN.COM>
<<< 550 <JDOE@YOUDROMAIN.COM>... Sender domain not found in DNS
550 <JDOE@AOL.COM>... Service unavailable

In an attempt to stem the flow of spam e-mail into their systems, many mail systems reject messages where the domain name part of the sender's address (the part after the "@") cannot be found in the DNS. This is effective against some spam because spammers often send out their mass mailings under phony addresses.

However it also turns away messages from legitimate senders whose e-mail addresses are incorrectly entered in their mail programs. In the example above YOURDOMAIN.COM customer "jdoe" tried to send a message to jdoe@aol.com. However, YOURDOMAIN.COM's John Doe mistyped the domain name part of his address as "youdromain.com" instead of "yourdomain.com" when he set up his mail program. The AOL mail system couldn't find a domain called "youdromain" in the DNS, so it rejected the message.

This will also block mail from legitimate senders who intentionally alter their e-mail addresses in their own anti-spam efforts ("jdoe@yourdomain.com.NOSPAM", for example).

What you should do:

Go into your mail program's setup and make sure your e-mail address is entered correctly, then resend your message.

 

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