I’m not aware of one.

From: UA-EAI <ua-eai-bounces@icann.org> On Behalf Of Don Hollander
Sent: Tuesday, February 5, 2019 7:51 PM
To: ua-eai@icann.org
Subject: [UA-EAI] Authoritative figures on mailboxes supported by various platforms

Does anyone know of a credible report that shows how many email addresses are under management by a service or being supported by an application?

https://techcrunch.com/2016/02/01/gmail-now-has-more-than-1b-monthly-active-users/ for example shows that Gmail has more than 1b (1.2 b I’ve seen elsewhere).

Don

Don Hollander

Secretary General – UASG

Skype: Don_Hollander