2025/07/03 by Yves-Marie Le Pors-Chauvel.

Unlock Peak Performance: Postmastery's Q1 2025 Email Delivery Benchmark is Here

We are thrilled to announce the release of Postmastery’s  Email Delivery Benchmark Q1 2025. 

This essential study, conducted from January to March 2025, offers a refined analysis incorporating billions of email transactions to deliver an even more robust and comprehensive overview of email performance.

benchmark

What can you find inside?

In this edition, we evaluate the most recent delivery trends across leading Mailbox Providers (MBPs). You’ll gain valuable insights into key metrics such as delivery rates, bounce rates, and deferred rates, providing actionable benchmarks to help you optimize your email strategies.
For example, the report shows Google's delivery rate edged up slightly to 99.42% (from 99.39% in Q4), and Outlook recovered from its Q4 dip to 99.86% (from 99.78%). Mimecast and Comcast, however, continued to show lower delivery efficiency, with Comcast at 98.77% and Mimecast at just 97.86%. It also highlights that authentication remains a top driver of bounces, with Gmail continuing to reject unauthenticated mail, often with 550 5.7.26, 5.7.30, and 5.7.27 errors dominating bounce logs.

Compare your performances

Discover how your email delivery performance compares with industry benchmarks and gain insights to stay ahead in the evolving digital landscape. By creating and publishing this report, we directly support our core mission: Empower email senders to achieve more.

You canDownload the Q1 2025 Email Delivery Benchmark Edition here

Need Help ?

Is your deliverability performance below average for senders? Postmastery engineers are here to help. In case of any need, feel free to reach out to us!

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