cpsps-ews15.kpnxchange.com rejected your message to the following email addresses:
**** Your message was rejected by the recipient email server. Please check the recipient's email address and try resending your message, or contact the recipient directly. For more tips to help resolve this issue, see DSN code 5.1.0 in Exchange Online - Office 365
cpsps-ews15.kpnxchange.com gave this error:
Recipient rejected.
Diagnostic information for administrators:
Generating server: VE1EUR03HT109.mail.protection.outlook.com
***
cpsps-ews15.kpnxchange.com
Remote Server returned '550 5.1.0 Recipient rejected.'
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Admin: e-mailadres verborgen i.v.m. privacy