I’ve also tried the same thing with OWA, worked properly with no error message. In Outlook and re-type the email address manually with no success. I’ve tried to send the same message to the same recipient with Outlook 20, try to delete the user Generating server: domain Remote Server returned '550 5.1.0 encapsulated INVALID address insideĪctually a user receives this IMCEAINVALID error when he try to send an email. The recipient's email address and try resending this message, or contact the recipient directly.ĭiagnostic information for administrators: FYI, it’s possible to receive NDR message to DG if the email came out of the Exchange server.ĭelivery has failed to these recipients or This message was rejected by the recipient email system. See below the error message when we try to send from the standard user. So the main problem is that Exchange is not able to send an email to an external email address because of IMCEAINVALID error. Indeed If we have this issue is because there is a problem with Exchange or Outlook. I’m going to be clearer, actually no NDR is received when IMCEAINVALID error on Exchange server. Yes DG is able to receive external emails and all members are receiving emails without any problems. The DG has been set up properly with its own email address and work properly. Yes it's correct, when a user sends email from DG email, no NDR is received in case of problem with an email not sent.
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