Hi. Any idea what would cause this error?

This is how I have it configured

/etc/courier/aliases/mydomain.org @mydomain.org: vince

/etc/courier/locals localhost

I try sending mail to jo...@mydomain.org (or any other name that does not exist as a real unix account), the message is never delivered, and it produces the the following errors.

Feb 23 00:19:57 mydomain courieresmtp:
id=000440AB.43FD45FC.00002575,from=<vin...@mydomain.org>,addr=<vinc...@mydomain.org>:
550-"The recipient cannot be verified. Please check all recipients of this Feb 23 00:19:57 mydomain courieresmtp:
id=000440AB.43FD45FC.00002575,from=<vin...@mydomain.org>,addr=<vinc...@mydomain.org>:
550 message to verify they are valid." Feb 23 00:19:57 mydomain courieresmtp:
id=000440AB.43FD45FC.00002575,from=<vin...@mydomain.org>,addr=<vinc...@mydomain.org>,status:
failure

and further down in the log I get

Feb 23 00:19:58 mydomain courieresmtp:
id=000440AB.43FD45FE.0000257D,from=<#@[]>,addr=<vin...@mydomain.org>: 501 <#@[]>:
domain literals not allowed Feb 23 00:19:58 mydomain courieresmtp:
id=000440AB.43FD45FE.0000257D,from=<#@[]>,addr=<vin...@mydomain.org>,status:
failure

If I add the specific alias

Is there something else I might be overlooking to get a all mail to a virtual domain as a catch all to work?