[Serusers] Returned mail: User unknown

The original message was received at Wed, 20 Aug 2003 20:03:42 -0400 (EDT) from pool-138-88-167-129.res.east.verizon.net [138.88.167.129] *** ATTENTION *** Your e-mail is being returned to you because there was a problem with its delivery. The address which was undeliverable is listed in the section labeled: "----- The following addresses had permanent fatal errors -----". The reason your mail is being returned to you is listed in the section labeled: "----- Transcript of Session Follows -----". The line beginning with "<<<" describes the specific reason your e-mail could not be delivered. The next line contains a second error message which is a general translation for other e-mail servers. Please direct further questions regarding this message to your e-mail administrator. --AOL Postmaster ----- The following addresses had permanent fatal errors ----- &lt;terrywasson(a)cs.com&gt; ----- Transcript of session follows ----- ... while talking to air-yb01.mail.aol.com.: <<< 550 MAILBOX NOT FOUND 550 &lt;terrywasson(a)cs.com&gt;om>... User unknown