# AI study shows older domains and authenticated emails double open rates for journalists

Digest AI · Marketing & Small Business · published 2026-10-19T12:00:45Z

Canonical: https://digestai.news/story/ai-study-shows-older-domains-and-authenticated-emails-double-open-rate

## Summary

A new analysis of 14.3 million emails by domain age and 39 million emails by subject line reveals that older domains (5‑6 years) achieve an average open rate of 34.9%, compared with 21.6% for domains only 1‑2 years old. Even when fully authenticated with SPF/DKIM/DMARC, young domains only reach 17.9% opens. In a separate test of 1,588 sending domains, fully authenticated domains recorded a 30.1% average open rate—almost four times the 7.8% rate for unauthenticated domains.

Subject‑line experiments show that lines stating a finding generate 43.1% opens and 1.37% replies, while teased lines drop to 39.8% opens and 0.88% replies. Concrete phrasing (e.g., “Raleigh Ranked #1 City for New Homeowners”) yields 43% opens versus 34.6% for vague wording. Placing the key statistic in the first 1‑3 words lifts open rates to 46% versus 38.9% when placed later. AI‑generated email summaries from Google, Apple and Microsoft pull most content from the first half of the message (87.1%, 82.5% and 65.4% respectively), favor bulleted text (Microsoft 92%, Google 65%, Apple 64%) and rarely include personalized intros.

## Key points

- Older domains (5‑6 years) achieve 34.9% open rates versus 21.6% for 1‑2‑year domains.
- Fully authenticated domains get 30.1% opens, about four times unauthenticated domains’ 7.8% rate (study of 1,588 domains).
- Subject lines that state a finding achieve 43.1% opens and 1.37% replies, while teased lines get 39.8% opens and 0.88% replies.

## Why it matters

Higher open rates and reply rates from older, authenticated domains and concrete subject lines let PR teams reach journalists more efficiently in an AI‑driven inbox.

## Sources

1. [The New Rules Of Journalist Outreach, Based On Millions Of Emails](https://searchenginejournal.com/the-new-rules-of-journalist-outreach-based-on-millions-of-emails/592060) (Search Engine Journal, 2026-10-19)

## Cite

Digest AI, "AI study shows older domains and authenticated emails double open rates for journalists", 19 October 2026, https://digestai.news/story/ai-study-shows-older-domains-and-authenticated-emails-double-open-rate

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