I have several users that frequently receive 550 error messages when sending mail. The most frequent message received in unknown user. Rebooting the server seems to resolve these issues, but only temporarly. Has anyone had similar issues? If so, how did you resolve them? Any assistance would be greatly appreciated. Thanks.FAQ. What do your logs say (the SMTP or SMTP- lines (not SMTPD lines) after the "RCPT TO:" line?
-Scott
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