>Remember my usa.net error?  It seems to have gone away *shrug*  I now have
>two new ones to contend with.  Both are AOL'ers.
>
>Here's the first error message:
>
<snip>

>The mail you sent could not be delivered to:
>550 [log in to unmask] is not a known user



This just means the person no longer has an AOL account.

Jilla