How will cross-channel compliance shape email’s future?

Something that's already happening: a subscriber who opts out of your text messages expects that preference to apply to your emails too. They might not say it out loud, but if it doesn't, you'll see it in complaint rates and unsubscribes. Cross-channel compliance is partly regulatory, but it's also just what subscribers now expect.

On the regulatory side, the most concrete development is unified preference management. GDPR doesn't say "email consent" or "SMS consent." It says you need a lawful basis for processing personal data, full stop. If you're using someone's phone number for SMS and their email for marketing, that's two separate data processing activities that both need justification. A preference center that only captures email preferences isn't covering your full compliance picture anymore.

In practice, this pushes organizations toward centralized consent management: one place where subscribers control all their communication preferences, and those preferences sync across your ESP, your SMS platform, your CRM, and any other channel you use. A few larger brands are already doing this. For smaller senders, the gap between "email preference center" and "full cross-channel consent platform" is still significant.

What this means for email specifically: your email opt-out rate won't fully capture subscriber dissatisfaction if they're also receiving (and tired of) SMS or push notifications. Your complaint rate might rise from cross-channel fatigue even when your email content is fine.

The sensible move right now is auditing what data you collect across channels, where consent is captured and stored, and whether unsubscribes from one channel actually propagate to the others. If you're not sure, that's the gap to close first.