HEADS-UP – Purview will starting April 1. 2023 be replacing the legacy OME way of encrypting outgoing mail from O365. If you don’t do anything, Microsoft will process all mail flow rules that currently applies OME protection to Microsoft Purview Message Encryption protection. This will bring a much more secure and flexible end-user experience, that …
Issue Overview A customer faced a problem where all new users created in the past week and newly added proxy addresses failed to receive emails from external senders due to Directory-Based Edge Blocking causing 550 5.4.1 NDR. Internal emails worked fine, but external messages were rejected with the error: 550 5.4.1 [user@Customerdomain.com]: Recipient address rejected: …
