This session encompasses overview of Exchange Online Mail Flow scenarios and troubleshooting common issues.

Timestamps:
00:00:00 Intro
00:01:05 Agenda
00:02:51 Basic Mail Flow
00:17:48 Overview of Transport Components
00:41:35 Hybrid Mail Flow
00:45:08 EOP Architecture
00:58:55 Enhanced Filtering for Connectors
01:05:51 Office 365 Mail Relay
01:24:54 Tools
01:43:32 Troubleshooting

References:

Message Header Analyzer
https://mha.azurewebsites.net/

Anti-spam message headers in Microsoft 365
https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/anti-spam-message-headers?view=o365-worldwide

Email non-delivery reports in Exchange Online
https://docs.microsoft.com/en-us/exchange/mail-flow-best-practices/non-delivery-reports-in-exchange-online/non-delivery-reports-in-exchange-online