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Exchange Online Protection (EOP) - Simply Explained
22 lug 2026 ·
16 min. 35 sec.
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Exchange Online Protection (EOP) - Simply Explained
Descrizione
Every Microsoft 365 tenant already has email protection, but few admins know where it stops. This episode breaks down Exchange Online Protection's three filtering layers, the zero-hour auto purge safety...
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Every Microsoft 365 tenant already has email protection, but few admins know where it stops. This episode breaks down Exchange Online Protection's three filtering layers, the zero-hour auto purge safety net and the gaps attackers exploit. Small and mid-sized businesses learn when EOP is enough and when Defender for Office 365 is worth the upgrade.
In this episode
Key takeaways
Worth quoting
“EOP is always on, even if you never touch a single setting. You could buy a Microsoft 365 license, never open the admin center. And EOP would still be filtering your email” – Mirko Peters (01:14)
“EOP does not sandbox unknown files. They can only catch threats that have already been identified.” – Mirko Peters (03:34)
Explore more on M365.FM
Follow and rate M365.FM in your podcast app, and join the free M365 community at m365con.net.
Become a supporter of this podcast: https://www.spreaker.com/podcast/m365-fm-microsoft-365-azure-cloud-power-platform-ai--6704921/support.
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In this episode
- 00:00 – Why the inbox matters
- 00:40 – What EOP is
- 01:32 – Layer one: anti-spam
- 02:59 – Layer two: anti-malware
- 04:41 – Layer three: anti-phishing
- 06:56 – Zero-hour auto purge
- 09:18 – Limits and Defender for Office 365
- 14:27 – How it all fits together
Key takeaways
- Exchange Online Protection is included in every Microsoft 365 plan and filters spam, known malware and basic phishing through connection filtering, content filtering, signatures and authentication checks.
- Zero-hour auto purge retroactively removes messages whose verdict changes after delivery, now also in Teams chats and the Deleted Items folder.
- EOP has no sandboxing, click-time link scanning or impersonation protection, so organizations with visible executives should add Defender for Office 365 and publish a strict DMARC record.
Worth quoting
“EOP is always on, even if you never touch a single setting. You could buy a Microsoft 365 license, never open the admin center. And EOP would still be filtering your email” – Mirko Peters (01:14)
“EOP does not sandbox unknown files. They can only catch threats that have already been identified.” – Mirko Peters (03:34)
Explore more on M365.FM
- Episode page: the full episode with chapters, quotes and FAQ on EOP's filtering layers
- Exchange Online – the mailbox service EOP protects, with ZAP enabled by default for every mailbox
- Microsoft 365 – every plan includes Exchange Online Protection at no extra cost
- Microsoft Teams – Teams chat messages are now also covered by zero-hour auto purge
- Related episode: Microsoft Purview eDiscovery — Simply Explained
Follow and rate M365.FM in your podcast app, and join the free M365 community at m365con.net.
Become a supporter of this podcast: https://www.spreaker.com/podcast/m365-fm-microsoft-365-azure-cloud-power-platform-ai--6704921/support.
Informazioni
| Autore | Mirko Peters M365, Azure & AI |
| Organizzazione | m365 FM |
| Sito | www.m365.fm |
| Tag |
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