# Two Providers, a Stubborn Plateau and a Very Long Tail: Email in the Tranco Top-1M

DevFeed: [Two Providers, a Stubborn Plateau and a Very Long Tail: Email in the Tranco Top-1M](<https://devfeed.tech/articles/two-providers-a-stubborn-plateau-and-a-very-long-tail-email-in-the-tranco-top-1m-11444.md>)

Original publisher: [Read original article](<https://labs.ripe.net/author/artem-berezin/two-providers-a-stubborn-plateau-and-a-very-long-tail-email-in-the-tranco-top-1m/>)

Author: Artem Berezin

Published: 2026-07-30T11:49:26Z

Content type: article

Language: en

Sources: [RIPE Labs](<https://devfeed.tech/sources/ripe-labs.md>)

Topics: [Time Series](<https://devfeed.tech/topics/time-series.md>), [microsoft 365](<https://devfeed.tech/topics/microsoft-365.md>), [Resilience](<https://devfeed.tech/topics/resilience.md>), [Google](<https://devfeed.tech/topics/google.md>), [Microsoft](<https://devfeed.tech/topics/microsoft.md>), [migration](<https://devfeed.tech/topics/migration.md>), [Server](<https://devfeed.tech/topics/server.md>), [Internet](<https://devfeed.tech/topics/internet.md>), [data](<https://devfeed.tech/topics/data.md>), [Software as a service](<https://devfeed.tech/topics/saas.md>), [proofpoint](<https://devfeed.tech/topics/proofpoint.md>)

Tags: [2026](<https://devfeed.tech/tags/2026.md>), [authentication](<https://devfeed.tech/tags/authentication.md>), [competition](<https://devfeed.tech/tags/competition.md>), [data](<https://devfeed.tech/tags/data.md>), [dns](<https://devfeed.tech/tags/dns.md>), [google](<https://devfeed.tech/tags/google.md>), [measurements](<https://devfeed.tech/tags/measurements.md>), [microsoft](<https://devfeed.tech/tags/microsoft.md>), [microsoft-365](<https://devfeed.tech/tags/microsoft-365.md>), [migration](<https://devfeed.tech/tags/migration.md>), [popular](<https://devfeed.tech/tags/popular.md>), [resilience](<https://devfeed.tech/tags/resilience.md>), [saas](<https://devfeed.tech/tags/saas.md>), [server](<https://devfeed.tech/tags/server.md>), [time-series](<https://devfeed.tech/tags/time-series.md>)

## AI overview

A decade of DNS measurements across the Tranco top 1 million domains shows that email infrastructure is consolidating around Google Workspace and Microsoft 365. Self-hosted mail servers declined from 44.6% in 2016 to 22.4% in July 2026, while the two leading providers together handled 38.6% of measured domains. DMARC enforcement has plateaued, and a large long tail of infrastructure remains difficult to classify. The article frames this concentration as a resilience concern because outages, filtering changes, or policy decisions could affect a substantial part of the email ecosystem.

## Source excerpt

Ten years of DNS measurements reveal three trends across the Internet's most popular domains: email continues to consolidate around two providers, DMARC enforcement has hit a plateau, and a surprisingly large long tail of infrastructure defies easy classification.