What are the deliverability implications of not following certification frameworks?

Not following certification frameworks does not automatically cause deliverability problems, but it removes potential advantages and may indicate underlying practice issues. Certification is not required for good deliverability.

However, senders who could not qualify for certification often have problems that do affect deliverability: poor authentication, high complaints, list quality issues. The same problems that prevent certification damage inbox placement.

Certification provides insurance and optimization. Certified senders benefit from trust signals during borderline filtering decisions. Non certified senders with excellent practices may perform similarly, but certification removes uncertainty about how providers evaluate their standing.