Month: June 2025

A digital graphic with network lines, email icons, and a large envelope symbol highlights Microsoft's New Email Authentication Mandate, emphasizing why DMARC and SPF are crucial for your business email security.

Why Microsoft Now Requires DMARC, SPF & DKIM — And What Your Business Must Do

As of May 5, 2025, Microsoft has begun enforcing DMARC, SPF, and DKIM for high-volume email senders. This is not a suggestion – it’s a requirement. Businesses that fail to comply risk having their emails rejected or marked as spam, potentially harming communication, reputation, and revenue. At Avantguard, we’ve already implemented these protocols across all […]
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