Verizon overview

Verizon Communications (Verizon) was created in June, 2000 when the telephone companies Bell Atlantic and GTE merged and combined operations. Verizon and its subsidiaries comprise one of the largest communication technology providers in the world with over 160,000 employees.

In June, 2015, Verizon acquired America Online (AOL) for AOL’s digital content and video advertising platform. As of October, 2016, email accounts were transitioned onto the AOL email infrastructure. In July, 2016, Verizon agreed to acquire Yahoo! For Yahoo!’s digital content and mobile user footprint.

The combined infrastructure for Verizon, AOL, and Yahoo! is expected to be completed in 2019.



North America; U.S.,,,;,


Suggested mail transfer agent (MTA) settings based on the Yahoo! infrastructure (this may vary based on your sending reputation - be sure to check your SMTP error codes for signs of throttling).

  • Simultaneous connections: 150
  • Throughput: 20 messages per connection

Feedback loop (FBL) application

AOL/Yahoo! Feedback Loop

Postmaster site

AOL/Yahoo! Postmaster


Return Path partnership with Verizon

Verizon partners with Return Path through AOL and Yahoo!’s use of Return Path’s Certification Whitelist. Senders participating in in Return Path's Certification program receive preferential treatment at Verizon.

Verizon delivery mediation

Verizon has a public escalation process (AOL/Yahoo!), which allows senders to open a trouble ticket or submit a feedback loop request.

Return Path guidance

Return Path understands AOL and Yahoo! well and may have data to diagnose deliverability issues. Refer to AOL/Yahoo!’s deliverability best practices and postmaster page for additional details on improving deliverability at Verizon.


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