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.
Validity Certification covers over 2.5 billion global inboxes, including three of the largest global mailbox providers and more than 80 others. Some of the partners we can share are:
Mailbox providers
- Microsoft
- Yahoo!
- Comcast
- Orange
Anti-spam/security vendors
- Cloudmark
- SpamAssassin
- Cisco Ironport
Many mailbox providers provide Certification benefits via their anti-spam or security vendor and may not directly participate in the Certification program.