For our luxury holiday client, this wasn’t a “nice-to-have” optimisation project. It was an existential one. Email performance was flat. Marketo was under scrutiny. And the CEO had made it very clear: Prove the value of the platform and the team behind it in 2025, or both were gone.

Online security standards have changed - as of February 24, 2026, Certificate Authorities (CAs) will issue public TLS/SSL certificates with a maximum validity of 199 days (previously 397 days). This is an industry-wide update driven by the latest CA/Browser Forum Baseline Requirements, and it’s all about strengthening security across the web.

Let’s be blunt: even the best email strategy in the world isn’t worth much if your emails never make it to the inbox. You can have beautifully crafted subject lines, laser-focused targeting, and the best AI-driven segmentation MarTech money can buy - but if your deliverability is off, you’re shouting into the void.

Starting May 5, 2025, Microsoft Outlook is rolling out new rules for high-volume email senders - and if you're sending more than 5,000 emails a day, you're on the list.