Undelivered Mail Returned to Sender

{From: MAILER-DAEMON@mail2.faircom.com Received: by mail2.faircom.com (Symantec Mail Security)
id 36E33528009;

This is the Symantec Mail Security program at host mail2.faircom.com.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The Symantec Mail Security program

<ricardo@faircom.com>: host usa2.faircom.com[208.149.224.227] said: 550
ricardo@faircom.com... No such user (in reply to RCPT TO command)