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1: Change domain to "Internal relay"
2: Create Distribution Group with all accounts in it (or use Dynamic Group). 3: Create mailbox (probably a Shared mailbox) for catchall. 4: Create a rule to move all messages to catchall account if the recipient is NOT a part of above group. https://www.godaddy.com/help/catch-all-email-not-supported-with-microsoft-365-40130 keywords: catch-all |