Observed Signal · Mar 19, 2026 · Market Report · Source: https://martech.org/feed/ · Impact: 4/5 · Sentiment: Positive
Email: The Backbone of Modern Marketing Identity and Delivery
The article argues that email has grown beyond a channel into core identity and deliverability infrastructure for marketers. Citing Gartner, Litmus/Validity and other industry research, it notes email’s share of digital marketing spend and high ROI, while warning that inbox placement and deliverability have become major operational challenges. Major inbox providers (Google, Yahoo, Gmail) have tightened authentication and unsubscribe requirements, and DMARC adoption has risen significantly. As third-party identifiers erode, the email address is described as the primary deterministic identifier for marketers, making email platforms systems of record that unify identity and engagement data. The market is expanding and consolidating—valued at $1.7B in 2025 and projected to reach $4.27B by 2034—with multiple recent M&A deals reshaping vendor capabilities. The piece accompanies a MarTech Intelligence Report update on email marketing platforms.
Email’s evolving role as a primary deterministic identifier and the tightening of authentication/deliverability requirements by major inbox providers materially affect marketing measurement, vendor selection, and operational risk; the market’s growth and M&A activity amplify commercial impact.
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Key Takeaways & Evidence Grounding
- Gartner’s 2025 CMO Spend Survey found email accounted for 7.4% of total digital marketing spend.
- Research from Litmus (via Validity) reported 65% of email programs generate between 10x and 50x ROI.
- EmailToolTester’s deliverability testing estimates average inbox placement rate at roughly 83%.
- Google and Yahoo began enforcing SPF, DKIM and DMARC plus one-click unsubscribe for bulk senders in February 2024; Gmail tightened enforcement further in November 2025.
- Fortune Business Insights valued the email marketing software market at $1.7 billion in 2025 and projected growth to $4.27 billion by 2034 (CAGR 10.6%).
Connected Companies & Entities
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Email Advertising: The Enduring Backbone of Ad Tech
Shirley Marschall’s weekly column examines email as a durable, multi-faceted channel in advertising technology. It argues that email has persisted for more than 50 years and remains the backbone of identity in ad tech, serving as a hashed common denominator shared by advertisers, publishers, CDPs, DMPs, DSPs and SSPs. The piece distinguishes two modes of email advertising: Type 1 Inbox Ads, inside the inbox via ad tech platforms; and Type 2 Ads in Emails, programmatically inserted banners in newsletters monetizing publishers. It notes Gmail as the dominant inbox ad provider, Apple Mail’s privacy-driven ad blocking, and global mobile OS shares (Android ~70%, iOS ~29%; US/UK/Canada iPhone dominating). It cites Google's Gemini integration in Gmail, raising questions about AI reading or training on emails and user opt-outs. It also highlights newsletters as a booming, relatively stable monetization path, while privacy filters and AI summaries increasingly affect email metrics and creative.
InboxAlly Highlights Email Deliverability's Critical Role
InboxAlly, an email deliverability platform, published insights emphasizing the importance of email deliverability for business communication. The article highlights that website contact forms often suffer from deliverability issues due to improper authentication (SPF, DKIM, DMARC) and poor sender reputation. InboxAlly offers tools such as automated email warmup, inbox placement testing, sender reputation scoring, and authentication monitoring. The company stresses that correct authentication and maintaining sender reputation are essential to avoid missing important inquiries. The insights aim to educate businesses on best practices for reliable email delivery and improved ROI from email campaigns.
Android CLI Adds Device Streaming and Skills
Google has announced updates to its Android CLI command-line tooling, enabling developers to access real physical devices remotely through Android Device Streaming. This feature allows AI agents to interact with devices over a secure ADB over SSL connection, including spinning up devices, deploying builds, collecting logs, and capturing screenshots. Additionally, the company has expanded its Android skills repository, which now includes over 20 structured instructions that ground AI agents with official Android development guidance. New skills cover areas such as Play policy compliance auditing, intent security, profiler usage, CameraX migration, and Wear Compose Material 3. The Wear Compose Material 3 skill has been highlighted, with early adopters like FotMob reporting significant productivity gains.
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