Due to confidentiality agreements with participating partners, we cannot share any type of list. However, we can give you more information about Certification and how it works. Please visit the Validity website for additional information.
Validity Certification covers roughly half the market with over 2.5 billion global inboxes, including three of the largest global mailbox providers and more than 80 others.
Many mailbox providers provide Certification benefits via their anti-spam or security vendor and may not directly participate in the Certification program.