https://www.m365.fm/entity/dmarc/An email authentication standard published in DNS that checks whether SPF or DKIM results align with the visible From domain and tells receivers to do nothing, quarantine or reject failing mail.enhttps://www.m365.fm/community/u/mirko-p/blog/spf-dkim-dmarc-exchange-online/https://www.m365.fm/community/u/mirko-p/blog/spf-dkim-dmarc-exchange-online/Thu, 29 Oct 2026 15:59:00 -0000articleLearn how to configure SPF, DKIM, and DMARC in Exchange Online to secure your domain, prevent spoofing, and ensure high email deliverability rates.https://www.m365.fm/show/episodes/defender-for-office-365/https://www.m365.fm/show/episodes/defender-for-office-365/Thu, 29 Oct 2026 00:00:00 -0000episodeMost tenants run Microsoft Defender for Office 365 on defaults and assume they are protected while attackers test their filters every day. This episode is for email security admins, security engineers and SOC teams who want to tune anti-phishing, Safe Links…https://www.m365.fm/show/episodes/exchange-online-simply-explained/https://www.m365.fm/show/episodes/exchange-online-simply-explained/Thu, 29 Oct 2026 00:00:00 -0000episodeExchange Online is the email engine inside Microsoft 365, wrapped in words nobody explains. It's the service that holds your mailbox, your calendar, and your contacts, and it runs on Microsoft's servers instead of a machine in your office. In this episode of…https://www.m365.fm/community/u/mirko-p/blog/m365-dmarc-rollout-guide-none-to-reject/https://www.m365.fm/community/u/mirko-p/blog/m365-dmarc-rollout-guide-none-to-reject/Wed, 21 Oct 2026 10:04:52 -0000articleLearn how to safely roll out DMARC in Microsoft 365 from monitoring to strict rejection without breaking your organization's legitimate email delivery.https://www.m365.fm/show/episodes/spf-dkim-and-dmarc/https://www.m365.fm/show/episodes/spf-dkim-and-dmarc/Wed, 21 Oct 2026 00:00:00 -0000episodeLearn how SPF, DKIM and DMARC work together in Microsoft 365 to stop email spoofing, prevent Business Email Compromise, and secure your domain. Anyone with a laptop can send email that pretends to be your company. The email system we all rely on was built to…https://www.m365.fm/community/u/mirko-p/blog/securing-exchange-hybrid-mail-flow-best-practices/https://www.m365.fm/community/u/mirko-p/blog/securing-exchange-hybrid-mail-flow-best-practices/Thu, 24 Sep 2026 08:26:30 -0000articleLearn how to secure Exchange hybrid mail flow, configure SPF/DKIM/DMARC correctly, and prevent common security gaps in Microsoft 365 messaging.https://www.m365.fm/show/episodes/thomas-stensitzki/https://www.m365.fm/show/episodes/thomas-stensitzki/Thu, 24 Sep 2026 00:00:00 -0000episodeMany Microsoft messaging environments look secure on the surface but still run on defaults, weak identities and misunderstood mail flow. This conversation with Exchange MVP Thomas Stensitzki is for Exchange and Microsoft 365 administrators running…https://www.m365.fm/community/u/mirko-p/blog/demystifying-the-microsoft-365-tenant-architecture-identity-and-boundaries-explained/https://www.m365.fm/community/u/mirko-p/blog/demystifying-the-microsoft-365-tenant-architecture-identity-and-boundaries-explained/Thu, 27 Aug 2026 13:14:55 -0000articleWelcome back to the podcast! If you have ever listened to our episodes on cloud architecture, security, or enterprise administration, you know we love diving deep i…https://www.m365.fm/community/u/mirko-p/blog/beyond-email-protocols-why-spf-dkim-and-dmarc-arent-enough-against-deepfakes/https://www.m365.fm/community/u/mirko-p/blog/beyond-email-protocols-why-spf-dkim-and-dmarc-arent-enough-against-deepfakes/Wed, 26 Aug 2026 11:55:15 -0000articleWhen it comes to securing corporate inboxes, organizations have long relied on standard email authentication protocols as their primary shield. If you have spent an…https://www.m365.fm/community/u/mirko-p/blog/top-configuration-mistakes-that-weaken-exchange-online-protection/https://www.m365.fm/community/u/mirko-p/blog/top-configuration-mistakes-that-weaken-exchange-online-protection/Sat, 22 Aug 2026 20:24:34 -0000articleWelcome back to the blog! When it comes to securing your organization's digital workspace, email remains one of the primary attack vectors for cybercriminals. In ou…https://www.m365.fm/community/u/mirko-p/blog/mastering-the-five-layers-of-exchange-hybrid-beyond-the-wizard/https://www.m365.fm/community/u/mirko-p/blog/mastering-the-five-layers-of-exchange-hybrid-beyond-the-wizard/Tue, 11 Aug 2026 14:53:44 -0000articleMastering the Five Layers of Exchange Hybrid Beyond the Wizard Welcome back, podcasters and IT professionals! When you are setting up or managing an Exchange Hybri…https://www.m365.fm/show/episodes/microsoft-defender-for-office-365-simply-explained/https://www.m365.fm/show/episodes/microsoft-defender-for-office-365-simply-explained/Wed, 22 Jul 2026 00:00:00 -0000episodeModern phishing emails copy real branding and writing styles, so a basic spam filter no longer keeps a business safe. This episode is for Microsoft 365 admins, security teams and business owners. You learn how the five protection layers of Microsoft Defender…https://www.m365.fm/show/episodes/stop-deepfake-bec-the-verified-id-strategy/https://www.m365.fm/show/episodes/stop-deepfake-bec-the-verified-id-strategy/Tue, 05 May 2026 00:00:00 -0000episodeThis episode explores how deepfake-enabled Business Email Compromise (BEC) attacks are becoming more convincing and dangerous for organizations. Traditional trust signals like email addresses, writing style, or even voice messages are no longer reliable…https://www.m365.fm/show/episodes/hybrid-exchange-its-not-just-the-wizard/https://www.m365.fm/show/episodes/hybrid-exchange-its-not-just-the-wizard/Tue, 05 Aug 2025 00:00:00 -0000episodeHybrid Exchange Isn’t a Wizard—It’s a Web of Dependencies Running the Hybrid Configuration Wizard is the easy part. Keeping hybrid coexistence healthy requires aligning directory attributes, OAuth/federation trust, DNS (Autodiscover/MX/SPF/DKIM), EOP…