From: The Post Office <postmaster>
Sender:	mailer-daemon
Subject: Invalid local real name - or invalid newsgroup
Cc: The Post Office <postoffice>

In the following message, it appears from the format of certain addresses
that you have attempted to send a message to somebodys "Real.Name", or
alternatively to an USENET newsgroup.

Unfortunately both lookups have failed.  /etc/fullnames  didn't contain
proposed Real.Name, nor  /usr/lib/news/active  did have such a newsgroup.

It is a common mistake to write address alike:   user.host.domain
when you REALLY wanted it to be:                 user@host.domain
