Problema ao entregar o e-mail - retorno ao remetente / Undelivered Mail Returned to Sender

From: MAILER-DAEMON@mx3.bol.com.br
Domain: IP info mx3.bol.com.br
MX-server: IP info mx3.bol.com.br
Size: 784 Bytes
Create: 2020-11-19
Update: 2020-11-20
Score: 0
Safe: Yes

*** ENGLISH MESSAGE BELOW *** Mensagem do serviço de email no servidor a2-silver11.bol.com.br Lamentamos informar que não foi possível entregar sua mensagem para um ou mais destinatários. --------------------------------------------------------- This is the mail system at host a2-silver11.bol.com.br. 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 postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system : host mfbol.mail.sys.intranet[10.129.140.241] said: 550 RCPT TO: User unknown (in reply to RCPT TO command)

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