[Modus] Invalid address error

[John Fix 3rd]

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What does the error below mean?  Is there an RFC that prohibits the email
address format that they are using?

Thanks!

John


---- SMTPRS log entry made at 11/11/2003 14:21:32
SMTP command failed when talking to 65.210.205.146:
>>> MAIL FROM:<[EMAIL PROTECTED]> SIZE=1024 <<< 550 5.1.8
<[EMAIL PROTECTED]> Invalid address 



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