>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