Hostinger Finds 43.9% Raw Email Delivery Rate in 2026
New Hostinger analysis reveals only 43.9% of emails deliver despite 87.2% inbox placement average, exposing critical gap between deliverability metrics.
Hostinger Finds 43.9% Raw Email Delivery Rate in 2026
New Hostinger analysis reveals only 43.9% of emails deliver despite 87.2% inbox placement average, exposing critical gap between deliverability metrics.
New analysis from Hostinger draws a sharp line between the email deliverability numbers that dominate industry reports and what is actually happening at the infrastructure level. Hostinger analyzed 1 billion emails processed through its platform in January 2026 and found that only 43.9% were successfully delivered, with the remaining 56.1% blocked by spam and virus filters. That figure sits far below the global inbox placement benchmarks that most marketers use as their north star.
The gap between the two numbers is not a contradiction. The Validity Email Deliverability Benchmark Report measures something different: marketing email inbox placement for senders using established platforms. Both figures are accurate within their respective scopes, and together they show why the industry average appears healthier than the raw delivery picture. For anyone building or running an email program, the distinction matters enormously.
The 87.2% Headline Hides a Harder Truth
The global average inbox placement for marketing email was 87.2% in 2025, a 3.7 percentage-point gain year-over-year, according to Validity. That improvement reflects better practices among established senders on managed platforms. But it does not represent the full universe of email traffic, and Hostinger's raw delivery data makes that clear.
As the Unspam 2025 Email Deliverability Report notes, technical delivery success now overstates real inbox reach by approximately 40%. Providers accept emails at the SMTP level that are later filtered silently before a user ever sees them. Marketers relying on "delivered" as a proxy for "reached inbox" are working from an incomplete picture.
The provider-level picture reinforces this. According to Validity's 2024 Deliverability Benchmark, Gmail's inbox placement dropped slightly from 89.8% in early 2024 to 87.2% by Q4, following enforcement of new bulk-sender rules and stricter engagement filters. Microsoft remains one of the most difficult providers for marketers to reach, with Validity's 2025 data showing an average inbox placement rate of 75.6% and spam rates exceeding 14%, the highest among major mailbox providers.
New analysis from Hostinger draws a sharp line between the email deliverability numbers that dominate industry reports and what is actually happening at the infrastructure level. Hostinger analyzed 1 billion emails processed through its platform in January 2026 and found that only 43.9% were successfully delivered, with the remaining 56.1% blocked by spam and virus filters. That figure sits far below the global inbox placement benchmarks that most marketers use as their north star.
The gap between the two numbers is not a contradiction. The Validity Email Deliverability Benchmark Report measures something different: marketing email inbox placement for senders using established platforms. Both figures are accurate within their respective scopes, and together they show why the industry average appears healthier than the raw delivery picture. For anyone building or running an email program, the distinction matters enormously.
The 87.2% Headline Hides a Harder Truth
The global average inbox placement for marketing email was 87.2% in 2025, a 3.7 percentage-point gain year-over-year, according to Validity. That improvement reflects better practices among established senders on managed platforms. But it does not represent the full universe of email traffic, and Hostinger's raw delivery data makes that clear.
As the Unspam 2025 Email Deliverability Report notes, technical delivery success now overstates real inbox reach by approximately 40%. Providers accept emails at the SMTP level that are later filtered silently before a user ever sees them. Marketers relying on "delivered" as a proxy for "reached inbox" are working from an incomplete picture.
The provider-level picture reinforces this. According to Validity's 2024 Deliverability Benchmark, Gmail's inbox placement dropped slightly from 89.8% in early 2024 to 87.2% by Q4, following enforcement of new bulk-sender rules and stricter engagement filters. Microsoft remains one of the most difficult providers for marketers to reach, with Validity's 2025 data showing an average inbox placement rate of 75.6% and spam rates exceeding 14%, the highest among major mailbox providers.
Why More Than Half of All Email Gets Blocked
The volume of low-quality and unauthenticated email in the global stream is driving filter aggressiveness. Globally, 45 to 47% of email traffic is spam, and phishing attacks are soaring, with Cisco Talos reporting phishing used in 50% of incident response cases in early 2025, up from just 10% a quarter earlier. Inbox providers are responding with tighter default filtering that catches legitimate mail in the crossfire.
Authentication gaps make the problem worse. The EasyDMARC 2026 DMARC Adoption Report found that global DMARC adoption has reached 52.1% of the top 1.8 million domains, up from 47.7% in 2025 and 27.2% in 2023. Growth is real, but the enforcement picture is sobering. More than half a million of those domains remain at p=none, the monitoring-only policy that offers zero protection against spoofing.
Fully authenticated domains using DMARC are 2.7 times more likely to reach the recipient's inbox compared to unauthenticated domains. For marketers, that is not a technical footnote. That is a direct line to revenue.
AI Is Reshaping Both Sides of the Filter
The same AI that powers smarter spam detection is now a prerequisite for competitive email marketing. According to Validity's 2025 Deliverability Benchmark Report, there is a downstream impact of using AI on inbox placement, partially because mailbox providers have added their own AI features like summaries or annotations, and partially because AI has made it easier for spammers to send email at scale, eroding trust in legitimate senders and causing ISPs to tighten protections.
In early 2026, Google launched AI-powered features that summarize, prioritize, and filter emails before users see them, creating a new layer of semantic filtering beyond traditional spam detection. Content quality is now a deliverability signal, with Gmail's AI evaluating the clarity, structure, and value of email content.
For marketers who adapt, the upside is significant. Advanced AI adopters are 28% more likely to deploy an email in under a day (37% vs. 28% for early-stage teams). Generative AI is now the most impactful AI use in email marketing, cited by 22% of marketers, ahead of personalizing content at 15%, campaign analysis at 15%, and improving deliverability at 12%.
What Marketers Need to Do Now
The Hostinger findings point toward a specific set of actions that separate high-delivery senders from those losing more than half their emails before they reach a single inbox.
Senders who authenticate properly, maintain clean lists, and monitor their reputations are seeing real gains. For everyone else, the gap comes down to authentication and list hygiene, both of which are straightforward to address.
Stricter inbox rules from Google, Yahoo, and other major providers have pushed email authentication from best practice to bare minimum, especially for bulk email senders in 2025 and 2026. SPF, DKIM, and DMARC now form the essential identity layer that proves a sender is legitimate and that messages haven't been altered.
The biggest shifts in 2026 come down to three things: AI, authentication, and automation. Inbox providers are deploying AI to sort, summarize, and filter email before it reaches readers, making relevance and authentication prerequisites for visibility rather than differentiators.
Why More Than Half of All Email Gets Blocked
The volume of low-quality and unauthenticated email in the global stream is driving filter aggressiveness. Globally, 45 to 47% of email traffic is spam, and phishing attacks are soaring, with Cisco Talos reporting phishing used in 50% of incident response cases in early 2025, up from just 10% a quarter earlier. Inbox providers are responding with tighter default filtering that catches legitimate mail in the crossfire.
Authentication gaps make the problem worse. The EasyDMARC 2026 DMARC Adoption Report found that global DMARC adoption has reached 52.1% of the top 1.8 million domains, up from 47.7% in 2025 and 27.2% in 2023. Growth is real, but the enforcement picture is sobering. More than half a million of those domains remain at p=none, the monitoring-only policy that offers zero protection against spoofing.
Fully authenticated domains using DMARC are 2.7 times more likely to reach the recipient's inbox compared to unauthenticated domains. For marketers, that is not a technical footnote. That is a direct line to revenue.
AI Is Reshaping Both Sides of the Filter
The same AI that powers smarter spam detection is now a prerequisite for competitive email marketing. According to Validity's 2025 Deliverability Benchmark Report, there is a downstream impact of using AI on inbox placement, partially because mailbox providers have added their own AI features like summaries or annotations, and partially because AI has made it easier for spammers to send email at scale, eroding trust in legitimate senders and causing ISPs to tighten protections.
In early 2026, Google launched AI-powered features that summarize, prioritize, and filter emails before users see them, creating a new layer of semantic filtering beyond traditional spam detection. Content quality is now a deliverability signal, with Gmail's AI evaluating the clarity, structure, and value of email content.
For marketers who adapt, the upside is significant. Advanced AI adopters are 28% more likely to deploy an email in under a day (37% vs. 28% for early-stage teams). Generative AI is now the most impactful AI use in email marketing, cited by 22% of marketers, ahead of personalizing content at 15%, campaign analysis at 15%, and improving deliverability at 12%.
What Marketers Need to Do Now
The Hostinger findings point toward a specific set of actions that separate high-delivery senders from those losing more than half their emails before they reach a single inbox.
Senders who authenticate properly, maintain clean lists, and monitor their reputations are seeing real gains. For everyone else, the gap comes down to authentication and list hygiene, both of which are straightforward to address.
Stricter inbox rules from Google, Yahoo, and other major providers have pushed email authentication from best practice to bare minimum, especially for bulk email senders in 2025 and 2026. SPF, DKIM, and DMARC now form the essential identity layer that proves a sender is legitimate and that messages haven't been altered.
The biggest shifts in 2026 come down to three things: AI, authentication, and automation. Inbox providers are deploying AI to sort, summarize, and filter email before it reaches readers, making relevance and authentication prerequisites for visibility rather than differentiators.
The Hostinger data is a useful reset for teams that benchmark against headline inbox placement rates. A 43.9% raw delivery rate across one billion emails signals that the average email program is not competing against the industry's best senders. It is competing against infrastructure, filters, and a global spam ecosystem that has never been more aggressive. The teams that close that gap in 2026 will treat authentication, list quality, and AI adoption as operational priorities, not periodic audits.
No comments yet. Be the first!
The Hostinger data is a useful reset for teams that benchmark against headline inbox placement rates. A 43.9% raw delivery rate across one billion emails signals that the average email program is not competing against the industry's best senders. It is competing against infrastructure, filters, and a global spam ecosystem that has never been more aggressive. The teams that close that gap in 2026 will treat authentication, list quality, and AI adoption as operational priorities, not periodic audits.
