Communications

Email Deliverability Data

Bounce rates, spam folder placement, and ISP throttling patterns -- the data email platforms charge $10K/month for.

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Overview

What Is Email Deliverability Data?

Email deliverability data measures the ability of marketing emails to reach subscribers' inboxes, accounting for critical factors like bounce rates, spam folder placement, ISP throttling patterns, and sender reputation metrics. This data encompasses actual delivery performance across email service providers, tracking what percentage of campaigns arrive in primary inboxes versus spam folders or disappear entirely. Organizations use deliverability insights to optimize authentication protocols (SPF/DKIM), compliance with regulations like CAN-SPAM, and overall campaign effectiveness. The global email deliverability market is valued at USD 1.35 billion in 2026 and is projected to reach USD 2.8 billion by 2035, growing at a CAGR of 8.47% as e-commerce expansion and regulatory compliance demands drive adoption across enterprises, SMEs, and SMBs.

Market Data

83.1%

Average Deliverability Rate

Source: Email Tool Tester

10.5% average

Emails Landing in Spam Folders

Source: Email Tool Tester

34%

SMEs With Bounce Rates Above Threshold

Source: Business Research Insights

26%

Legitimate Emails Misdirected by ISPs

Source: Business Research Insights

8.47%

Market CAGR (2026–2035)

Source: Business Research Insights

Who Uses This Data

What AI models do with it.do with it.

01

Large Enterprises

Deploy scalable platforms supporting high-volume campaigns, advanced analytics, compliance with global regulations, and integration with enterprise marketing automation ecosystems to protect brand reputation.

02

E-commerce & Digital Retailers

Optimize transactional and promotional email delivery to maximize conversion rates, reduce cart abandonment notifications ending in spam, and maintain customer engagement across touchpoints.

03

SMEs & SMBs

Access cost-effective solutions to streamline outreach, improve sender credibility, increase inbox placement rates, and reduce bounce and spam incidents with limited technical resources.

04

Marketing Agencies & Service Providers

Monitor campaign performance across multiple client domains, ensure compliance with CAN-SPAM and GDPR requirements, and troubleshoot ISP throttling and authentication failures.

What Can You Earn?

What it's worth.worth.

Enterprise Deliverability Analytics

Varies

High-volume platforms monitoring bounce rates, ISP feedback loops, and spam placement across millions of emails command premium pricing for real-time reporting and dedicated support.

SME Compliance & Optimization Tools

Varies

Mid-market solutions providing SPF/DKIM validation, list hygiene, and CAN-SPAM compliance verification target cost-conscious users seeking improved inbox placement.

ISP Throttling & Reputation Monitoring

Varies

Specialized services tracking ISP rejection patterns, sender reputation scores, and authentication failures serve agencies managing multiple client campaigns.

What Buyers Expect

What makes it valuable.valuable.

01

Bounce Rate Accuracy

Precise identification of hard bounces (invalid addresses), soft bounces (temporary unavailability), and unsubscribe rates. Buyers expect data segmented by bounce type to guide list management decisions.

02

ISP Feedback Loop Integration

Real-time data on spam complaints, throttling thresholds, and ISP-specific filter placement patterns from major providers like Gmail, Outlook, and Yahoo to optimize sender reputation.

03

Authentication Compliance Metrics

Validation of SPF/DKIM/DMARC implementation status, CAN-SPAM header transparency, and opt-in system compliance. Over 51% of audited U.S. firms adopted compliant measures in 2023.

04

Industry-Specific Benchmarks

Segmented deliverability rates by vertical (e-commerce, finance, healthcare, real estate) allowing clients to compare performance against sector standards and identify improvement opportunities.

Companies Active Here

Who's buying.buying.

Klaviyo

Top-rated email platform delivering 5-star deliverability performance across marketing automation campaigns

ActiveCampaign

Enterprise CRM and marketing automation provider leveraging deliverability data for customer engagement optimization

Omnisend

Multi-channel marketing platform using deliverability insights to optimize email placement and cross-channel customer experiences

Google & Microsoft (ISPs)

Major email providers tightening spam filters and generating ISP throttling data that platforms rely on for reputation metrics

FAQ

Common questions.questions.

What counts as good email deliverability?

An email deliverability rate above 89% is considered good, while rates above 95% are excellent. Rates below 80% indicate poor performance requiring list and authentication review. The average across major platforms is 83.1%, meaning approximately 16.9% of emails fail to reach inboxes.

Why do so many legitimate emails end up in spam folders?

According to IETF data, over 85% of email traffic globally was flagged as spam in 2023. ISPs like Google and Microsoft tightened filters, causing 26% of legitimate marketing emails to be redirected to promotions or spam tabs due to insufficient reputation metrics and lack of feedback loop integration. Missing SPF/DKIM authentication and poor sender reputation are primary culprits.

How does ISP throttling impact campaign delivery?

ISPs monitor sender volume and reputation, temporarily slowing or rejecting delivery when suspicious patterns emerge. Deliverability data platforms track throttling patterns across major ISPs, helping senders adjust campaign velocity and authentication to maintain inbox placement and avoid reputation damage.

What role does compliance play in deliverability?

CAN-SPAM compliance improved email credibility significantly—over 51% of audited U.S. firms had adopted compliant opt-in systems and header transparency measures by 2023, which led to improved deliverability scores across major ISPs. Strict privacy regulation compliance affects approximately 30% of potential market clients, making authentication and consent tracking critical.

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