Wednesday , October 23 2019

MailFlow

550 Address unknown – Sophos UTM 9

From Office365/Gmail fails to Exchange On-Premises External to Internal Mails 550 Address unknown Anti-spam Sophos UTM 9 NDR From Office 365 to Exchange 2010/2013/2016 On Premises – Original Message DetailsCreated Date:11/8/2016 4:25:50 PMSender Address:test@external.comRecipient Address:user@careexchange.inSubject:Test333Created Date:11/8/2016 4:25:50 PMSender Address:test@external.comRecipient Address:user@careexchange.inSubject:Test333 Error Details Reported error:550 5.0.350 Remote server returned an error ...

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