SMTP Relay in Office 365 environmentGP0|#1efc1928-ec24-4343-bf34-458895797e8c;L0|#01efc1928-ec24-4343-bf34-458895797e8c|SMTP;GTSet|#68e31ecf-dbe9-45e0-8a3c-fc6bd6ad0ce6;GPP|#416f8251-f4d5-40dc-be28-d7400d10de85;GPP|#74f9ea2a-fcec-489f-9ca4-da563b559213 ‚ÄčIf you want SharePoint on-prem to deliver email alerts to Exchange Online (O365) then this article describes how to configure an IIS SMTP relay.