Email Deliverability Statistics 2026: Inbox & Spam Data
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Improve My EmailsDirect Answer: Email Deliverability Statistics at a Glance
A high delivery rate does not prove that email reached the inbox. Dotdigital reports a 99.21% delivery rate across its customer benchmark, while Sinch Mailgun found that only 12.3% of surveyed senders correctly defined delivery rate as mail accepted into any folder. Just 13.3% used inbox-placement reports, 53% did not monitor major blocklists, and only 32% actively monitored spam complaints.
This 2026 edition contains 56 claim-level email deliverability statistics and operational thresholds. Every record has a permanent ID, evidence type, population, period, source section, and limitation.
Data years covered: 2023, 2024, 2025, and 2026. Last verified: July 10, 2026. The edition year identifies this maintained edition; it does not imply that every survey response was collected in 2026.
For engagement metrics such as opens, clicks, CTOR, and orders, use the email marketing benchmarks report. For campaign execution, use the email marketing strategy guide. Cold outreach performance remains a separate population in the cold email statistics report.
Cite This Report
Use the canonical page for context and a claim fragment for a specific statistic. The downloadable formats contain the same 56 records, so editors can audit a figure without scraping the article table.
Canonical URL: https://konabayev.com/blog/email-deliverability-statistics/
Recommended citation: Tugelbay Konabayev, “Email Deliverability Statistics 2026: Inbox & Spam Data,” Konabayev.com, July 10, 2026, https://konabayev.com/blog/email-deliverability-statistics/
Machine-readable versions:
Use a claim fragment when citing an individual finding, for example https://konabayev.com/blog/email-deliverability-statistics/#ed-033. The downloadable records preserve the source section and caveat for fact-checking.
No source chart, screenshot, or substantial report excerpt is republished. The dataset contains neutral factual paraphrases linked to the original public evidence.
Ten Most Citable Email Deliverability Statistics
The strongest retrieval claims expose the difference between server acceptance, inbox placement, and sender reputation. Each figure below remains attached to its original population and evidence type.
| Claim | Statistic | Source |
|---|---|---|
| ED-003 | 48% of surveyed senders named staying out of spam as a top deliverability challenge. | Sinch Mailgun |
| ED-004 | 53% did not monitor major email blocklists for their domains or IPs. | Sinch Mailgun |
| ED-019 | 66.2% said they used both SPF and DKIM. | Sinch Mailgun |
| ED-021 | 53.8% said they used DMARC in 2024. | Sinch Mailgun |
| ED-032 | Only 32% actively monitored spam complaints as a deliverability metric. | Sinch Mailgun |
| ED-033 | Only 12.3% correctly identified delivery rate as delivery to any folder. | Sinch Mailgun |
| ED-036 | 13.3% used inbox-placement reports to measure deliverability. | Sinch Mailgun |
| ED-047 | Dotdigital reported a 99.21% global delivery rate among its customers. | Dotdigital |
| ED-053 | Google recommends keeping spam rates below 0.1% and avoiding 0.3%. | |
| ED-055 | Yahoo requires bulk senders to honor unsubscribe requests within two days. | Yahoo |
The Sinch Mailgun findings come from a July 2024 survey of 1,100 global senders, including users of Mailgun, Mailjet, and Email on Acid. Dotdigital’s figures are platform telemetry from its own customers. Google and Yahoo figures are operational policies, not survey benchmarks. Do not average these evidence types.
What the Evidence Actually Says
The central finding is a measurement mismatch: senders report strong authentication and delivery rates while direct placement and reputation monitoring remain uncommon. Four conclusions are supported without turning vendor surveys into universal averages.
1. Delivery rate and inbox placement answer different questions
Delivery rate counts messages accepted by a receiving server, including messages sent to junk. Inbox-placement rate asks where accepted messages landed. Yet 50.9% of the Mailgun sample thought delivery rate meant inbox delivery, and only 13.3% used inbox-placement reports. A dashboard can therefore show 99% delivery while hiding a material spam-folder problem.
2. The measurement gap is larger than the authentication gap
Two-thirds of surveyed senders reported using both SPF and DKIM, and 53.8% used DMARC. Monitoring was weaker: 53% did not check major blocklists, nearly 70% used none of the major mailbox-provider reputation tools, and only 32% actively watched spam complaints. Authentication is necessary infrastructure, but it does not replace ongoing reputation and placement measurement.
3. The practical spam threshold is lower than the enforcement ceiling
Google recommends staying below a 0.1% spam rate and avoiding 0.3%. Yahoo requires senders to stay below 0.3%. In practical terms, one complaint per 1,000 inbox-delivered messages is already 0.1%; three complaints per 1,000 reach 0.3%. These thresholds are mailbox-provider policies, not universal forecasts of when every message will be filtered.
4. Easy unsubscribe became a reputation control
The share of Mailgun respondents selecting easy unsubscribe as a reputation tactic increased from 1.6% in the 2023 survey to 20.6% in the 2024 survey. Yahoo requires bulk senders to honor unsubscribe requests within two days. This does not mean unsubscribe links directly improve placement; it means unwanted recipients need a safer exit than a spam complaint.
All 56 Email Deliverability Statistics
This claim registry is grouped by decision use rather than by source. IDs stay stable across the article, CSV, JSON, and JSONL files.
Sender priorities and requirements
| Claim | Finding | Evidence |
|---|---|---|
| ED-001 | 78.5% rated deliverability importance between 8 and 10 out of 10. | Mailgun |
| ED-002 | 46% rated deliverability importance a full 10 out of 10. | Mailgun |
| ED-003 | 48% named staying out of spam as a top challenge. | Mailgun |
| ED-006 | 63% were at least somewhat familiar with Gmail and Yahoo sender requirements. | Mailgun |
| ED-007 | 49.5% of aware senders changed their programs in response. | Mailgun |
| ED-009 | 59% were concerned about the requirements. | Mailgun |
| ED-010 | 23% reported challenges after enforcement began. | Mailgun |
| ED-017 | 30.5% said the changes were good for email’s future. | Mailgun |
| ED-018 | 33.2% considered the changes necessary, even if inconvenient. | Mailgun |
| ED-051 | Google treats about 5,000 messages to personal Gmail accounts in 24 hours as bulk sending. | |
| ED-052 | Google requires Postmaster Tools spam rates below 0.3%. | |
| ED-053 | Google recommends staying below 0.1% and avoiding 0.3%. | |
| ED-054 | Yahoo requires spam complaint rates below 0.3%. | Yahoo |
| ED-056 | Yahoo began gradually enforcing updated standards in February 2024. | Yahoo |
Authentication, unsubscribe, and list practices
| Claim | Finding | Evidence |
|---|---|---|
| ED-005 | 39% rarely or never conducted list hygiene. | Mailgun |
| ED-008 | 79% of senders who changed programs updated authentication. | Mailgun |
| ED-011 | 33.1% worked to implement RFC 8058 one-click unsubscribe. | Mailgun |
| ED-013 | 35.8% increased list-hygiene efforts. | Mailgun |
| ED-015 | 18.6% adjusted sending frequency. | Mailgun |
| ED-016 | 12.5% changed their opt-in process. | Mailgun |
| ED-019 | 66.2% used both SPF and DKIM. | Mailgun |
| ED-020 | 25.7% were unsure how their organizations used SPF and DKIM. | Mailgun |
| ED-021 | 53.8% used DMARC in 2024. | Mailgun |
| ED-022 | 31.8% of DMARC users had a p=none policy. | Mailgun |
| ED-023 | 19.3% of DMARC users had a quarantine policy. | Mailgun |
| ED-024 | 17.7% of DMARC users had a reject policy. | Mailgun |
| ED-025 | 31.3% of DMARC users were unsure which policy they used. | Mailgun |
| ED-026 | 5.7% had implemented BIMI. | Mailgun |
| ED-027 | 11.4% were working to implement BIMI. | Mailgun |
| ED-055 | Yahoo requires bulk senders to honor unsubscribes within two days. | Yahoo |
Measurement and inbox placement
| Claim | Finding | Evidence |
|---|---|---|
| ED-004 | 53% did not monitor major email blocklists. | Mailgun |
| ED-012 | 37% of senders who changed programs began monitoring complaints more closely. | Mailgun |
| ED-014 | 19.2% began using Google Postmaster Tools. | Mailgun |
| ED-028 | 57.4% used open and click rates to measure deliverability. | Mailgun |
| ED-029 | 53.1% used delivery rate. | Mailgun |
| ED-030 | 46.5% used bounce rates. | Mailgun |
| ED-031 | 39.5% used unsubscribe rate. | Mailgun |
| ED-032 | 32% actively monitored spam complaints. | Mailgun |
| ED-033 | 12.3% correctly defined delivery rate as delivery to any folder. | Mailgun |
| ED-034 | 50.9% incorrectly thought delivery rate measured inbox delivery. | Mailgun |
| ED-035 | 22.8% incorrectly thought delivery rate measured overall deliverability. | Mailgun |
| ED-036 | 13.3% used inbox-placement reports. | Mailgun |
| ED-037 | About 24% of senders above one million emails per month tested inbox placement. | Mailgun |
| ED-038 | Nearly 70% used none of Google Postmaster Tools, Microsoft SNDS, or Yahoo Sender Hub. | Mailgun |
| ED-047 | Dotdigital reported a 99.21% global delivery rate. | Dotdigital |
| ED-048 | Dotdigital reported a 0.74% global soft-bounce rate. | Dotdigital |
| ED-049 | Dotdigital reported a 0.05% global hard-bounce rate. | Dotdigital |
| ED-050 | Dotdigital reported a 0.79% global overall bounce rate. | Dotdigital |
Reputation and ownership
| Claim | Finding | Evidence |
|---|---|---|
| ED-039 | 34.5% chose list hygiene as a leading reputation tactic. | Mailgun |
| ED-040 | 28.3% chose reducing spam complaints. | Mailgun |
| ED-041 | 20.6% chose easier unsubscribe in 2024. | Mailgun |
| ED-042 | 1.6% chose easier unsubscribe in 2023. | Mailgun |
| ED-043 | 14.7% chose increased engagement in 2024. | Mailgun |
| ED-044 | 25.4% chose increased engagement in 2023. | Mailgun |
| ED-045 | 31.7% said IT owned deliverability. | Mailgun |
| ED-046 | 16.7% said marketing owned deliverability. | Mailgun |
A Practical Deliverability Measurement Stack
Measure acceptance, placement, reputation, authentication, and audience health separately. Collapsing these layers into one percentage makes a clean SMTP result look like proof of inbox delivery.
The evidence supports a layered measurement model rather than a single “deliverability rate”:
- Acceptance: delivery rate, hard bounces, soft bounces, and SMTP responses.
- Placement: seeded inbox-placement tests across the mailbox providers that matter to the audience.
- Reputation: Google Postmaster Tools, Microsoft SNDS, Yahoo Sender Hub, complaint feeds, and blocklists.
- Authentication: SPF, DKIM, DMARC alignment, TLS, and forward/reverse DNS.
- Audience health: consent, complaints, unsubscribes, engagement, inactive contacts, and list hygiene.
The order matters. A 99% acceptance rate cannot compensate for missing inbox-placement evidence, and perfect authentication cannot compensate for unwanted mail. For tool selection after the measurement model is clear, compare the best email marketing tools rather than treating vendor delivery rates as interchangeable.
How to Use These Statistics Without Misreporting Them
Choose the claim that matches the question, then preserve its population, denominator, and limitation. Most apparent contradictions in deliverability reporting come from comparing different metrics or treating a platform rule as an industry average.
Start by separating survey evidence from platform telemetry. The Mailgun results describe what 1,100 senders reported doing or believing. They can answer questions such as how many respondents monitored complaints or understood delivery rate. They cannot establish the actual global share of authenticated domains because the survey did not audit DNS records. Dotdigital’s delivery and bounce figures come from customer sends, so they describe observed platform performance but not every email provider or sender.
Next, preserve the denominator. Google’s 0.1% recommendation and 0.3% ceiling are spam rates in Postmaster Tools. Yahoo calculates its complaint rate from messages delivered to the inbox. A generic campaign “complaint rate” exported by an ESP may use sent, delivered, or inbox-delivered messages as its denominator. Percentages with different denominators are not interchangeable even when they use the same label.
Keep delivery and placement separate in dashboards and articles. Delivery is a server-acceptance outcome. Placement describes whether accepted mail reached the inbox, spam, or another folder. Open rate is not a reliable substitute for placement because privacy protections, image blocking, and bot activity can change the observed open signal. The email marketing benchmarks report explains the engagement layer; this report covers infrastructure and placement.
Finally, do not present a mailbox-provider threshold as a safe operating target. The 0.3% figure is a maximum boundary in Google and Yahoo guidance. Google’s recommendation to stay below 0.1% is the more useful planning signal. Teams should review complaint trends by provider, sending stream, audience source, and campaign rather than waiting for an account-wide average to cross the ceiling.
Methodology and Source Notes
Every published row keeps the evidence needed to audit or reject it. Source type, population, period, section, and caveat are stored next to the headline figure.
This page was built from public evidence collected through the project’s Firecrawl-first research route and verified on July 10, 2026. The full Mailgun PDF was read from the same official URL after Firecrawl identified it but returned only a truncated body. Ahrefs API v3 was used separately for topic validation and competitor referring-domain counts; Ahrefs metrics are not mixed into these 56 claims.
Sinch Mailgun State of Email Deliverability 2025
- Population: 1,100 global senders, including users of Mailgun, Mailjet, and Email on Acid.
- Fieldwork: July 2024.
- Evidence type: Vendor-sponsored self-report survey.
- Limitation: The sample may overrepresent Sinch-brand users. The findings describe reported practices and beliefs, not causal outcomes.
Dotdigital 2026 benchmark
- Population: Dotdigital customer email sends worldwide.
- Evidence type: First-party platform telemetry.
- Limitation: Customer telemetry is not representative of every sender. Delivery includes accepted mail that may land outside the inbox.
Google and Yahoo sender policies
- Population: Senders to personal Gmail and Yahoo-managed mailboxes.
- Evidence type: Official operational requirements.
- Limitation: Policies are not industry averages. Definitions and enforcement may change, so implementation teams should recheck the live pages.
The canonical JSON ledger preserves claim_id, metric_category, source_section, source_quality, evidence_type, population, geography, period, and caveat. Claims without enough context to preserve those fields were excluded.
FAQ
These answers distinguish delivery, placement, complaints, and authentication instead of combining them into one score. Use the linked claim IDs when a number needs to be cited independently.
What is a good email delivery rate in 2026?
Dotdigital reports 99.21% across its customers, but delivery rate measures receiving-server acceptance, not inbox placement. Use it as a bounce-control metric, not proof that 99.21% reached the inbox.
What is a good spam complaint rate?
Google recommends staying below 0.1% and avoiding 0.3%; Yahoo requires staying below 0.3%. Treat 0.3% as an enforcement ceiling, not a target. One complaint per 1,000 inbox-delivered messages is already 0.1%.
What is the difference between delivery rate and inbox-placement rate?
Delivery rate is the share accepted into any folder. Inbox-placement rate is the share of delivered messages that reached the inbox. Mailgun found that only 12.3% of surveyed senders defined delivery rate correctly and only 13.3% used inbox-placement reports.
How many senders use SPF, DKIM, and DMARC?
In the Mailgun survey, 66.2% reported using both SPF and DKIM, while 53.8% reported using DMARC. These are self-reported adoption figures from one vendor survey, not DNS audits of all sending domains.
Where can I download the data?
Use the CSV for spreadsheets, JSON for structured applications, or JSONL for line-by-line processing. All formats contain the same 56 claim IDs.
Last verified: July 10, 2026.
