Inbox Trust Starts Here: Mastering the List‑Unsubscribe Header for Deliverability Success

Respecting Choice, Protecting Reputation: The Power of the List‑Unsubscribe Header

Email deliverability is not just about passing technical checks. It is about earning trust from inbox providers and recipients alike. At the center of this trust is the List‑Unsubscribe header, now a compliance requirement under Gmail’s sender requirements, Yahoo’s bulk sender guidelines, and Microsoft’s aligned standards. More than a checkbox, it is the trust signal that protects reputation and unlocks deliverability success.

When configured correctly, the header gives recipients a simple, one‑click way to opt out. This reduces spam complaints, strengthens sender reputation, and demonstrates respect for choice. Oracle Eloqua makes it straightforward to enable the List‑Unsubscribe header through