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The mail system
: host gw.watanabe.co.th[58.64.21.74] said: 550
5.1.1 : Recipient address rejected: User
unknown in local recipient table (in reply to RCPT TO command)
Final-Recipient: rfc822; watanabeheat@watanabe.co.th
Original-Recipient: rfc822;watanabeheat@watanabe.co.th
Action: failed
Status: 5.1.1
Remote-MTA: dns; gw.watanabe.co.th
Diagnostic-Code: smtp; 550 5.1.1 : Recipient
address rejected: User unknown in local recipient table