Which email inbox providers participate in Validity Sender Certification?
Summary
What email marketers say8Marketer opinions
Email marketer from Senderscore suggests that Validity Certification improves sender reputation, thereby influencing how mailbox providers handle email. However, the explicit list of involved providers isn't provided.
Email marketer from EmailVendorSelection.com explains that Validity Certification (formerly Return Path Certification) helps improve email deliverability by ensuring emails reach the inbox, reduces false positives, and enhances sender reputation among participating mailbox providers.
Email marketer from Litmus discusses deliverability best practices and mentions Return Path (now Validity) certification as an important factor in achieving good inbox placement with many providers.
Marketer from Email Geeks answers that ATT is hosted by us (presumably Validity) but mail makes it way through ATT’s proxies first.
Email marketer from Reddit shares the opinion that Validity Certification can assist with deliverability to major ISPs, such as Gmail and Yahoo, though exact participation details are unclear.
Marketer from Email Geeks shares a shortlist of providers that are public and participate in Validity Certification: <https://help.returnpath.com/hc/en-us/articles/360002901972-Which-mailbox-providers-and-security-vendors-accept-Validity-Certification->
Email marketer from Email Marketing Forum mentions that Return Path (now Validity) certification can help improve sender reputation with many of the major mailbox providers, but refrains from explicitly naming them.
Email marketer from StackOverflow mentions using Return Path (now Validity) Certification to improve email deliverability, implying that various ISPs acknowledge the certification. However, they do not provide the exact list.
What the experts say2Expert opinions
Expert from Spam Resource explains that Return Path Certification (now Validity Certification) aims to improve inbox placement, especially with major providers like Gmail, Yahoo, and AOL; however, a full public list isn't available due to confidentiality agreements.
Expert from Word to the Wise, Laura Atkins, notes Validity Certification (formerly Return Path) helps with deliverability to providers like Gmail, Yahoo and AOL. The exact list of participating providers is not public.
What the documentation says4Technical articles
Documentation from SparkPost mentions Return Path (now Validity) Certification as a method for improving deliverability but does not explicitly list all participating providers.
Documentation from Oracle Responsys states Return Path Certification (now Validity) gives preferential treatment for certified senders. They highlight it improves deliverability and reputation, but not all participants are public.
Documentation from Validity specifies that certified senders get better deliverability, but doesn't disclose a complete list of participating providers due to confidentiality agreements.
Documentation from Validity Help Center provides a list of mailbox providers and security vendors that accept Validity Certification, which includes providers like AOL, Apple iCloud Mail, and Yahoo! Mail. However, they state not all participants are publicly disclosed.