What are deliverability certification programs?
Deliverability certification programs verify that senders meet established standards and follow best practices, providing third party validation that mailbox providers can trust. Certified senders may receive preferential treatment in filtering decisions.
Major programs include CSA (Certified Senders Alliance) in Europe and Validity Certification (formerly Return Path Certification) globally. These programs audit sender practices, monitor compliance, and revoke certification for violations.
Certification demonstrates commitment to responsible sending without mailbox providers individually evaluating each sender. The certification body's reputation backs your standing, creating trust shortcuts that can improve deliverability to participating providers.
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