Electronic mail shouldn’t be going wherever. However the distance between e-mail packages that put money into measurement, deliverability, and optimization and those who run on assumptions is getting wider yearly.
Mailgun’s 2026 Electronic mail Impression Report attracts from a worldwide survey of greater than 1,200 e-mail senders and an evaluation of over 400 billion actual emails despatched via Mailgun infrastructure in 2025. The report spans 5 chapters masking ROI, business benchmarks, deliverability, AI adoption, and funding traits.
Listed below are the findings that matter most for e-mail senders heading into the second half of 2026.
Electronic mail ROI is robust. Electronic mail ROI measurement shouldn’t be.
78% of senders say e-mail is “very” or “extraordinarily” vital to their group. That degree of buy-in is difficult to seek out for any advertising channel. However organizational perception and organizational proof are two various things.
Fewer than half of senders actively measure the ROI of their e-mail packages, whether or not promotional (46%) or transactional (43%). Most groups are working on conviction fairly than proof.
Amongst those that do measure, the numbers make a powerful case: 60% of senders monitoring promotional e-mail ROI report a return higher than $10 for each $1 spent. 62% report the identical for transactional e-mail. And 13% report returns exceeding $40 for each greenback invested, although Mailgun’s analysis means that extraordinarily excessive ROI may very well sign underinvestment fairly than peak effectivity.
The most important barrier to elevated e-mail funding? 43% of senders cite finances constraints. However finances is difficult to win with out information, and most groups will not be gathering the information they should make the case. The report recommends beginning with income per marketing campaign as an intermediate step towards full ROI monitoring, even when the attribution mannequin shouldn’t be good from the beginning.
60% of senders who measure promotional e-mail ROI report returns higher than $10 for each $1 spent
400 billion emails reveal the place the benchmarks truly sit
Most benchmark information within the e-mail business comes from surveys and self-reported estimates. Chapter 2 of the report takes a distinct strategy: actual sending information from Mailgun infrastructure throughout the highest 10 industries by quantity in 2025.
The numbers on the prime and backside of the desk inform totally different tales. Air Freight & Logistics leads with a 99.25% supply fee and 0.01% bounce fee, pushed nearly totally by transactional sends (transport confirmations, monitoring updates) to recipients who count on and wish these messages. Media sits at 95.95%, the bottom within the prime 10, the place excessive volumes and broad promotional audiences create pure downward strain on supply metrics.
However supply fee alone can mislead. An e-mail “delivered” to the spam folder nonetheless counts as delivered. The report makes a transparent case that senders ought to pair supply fee monitoring with inbox placement testing to grasp the place emails are literally touchdown, not simply whether or not they have been accepted.
One comparability price flagging: Data Know-how logged 261 million unsubscribes, the best uncooked quantity within the desk. However throughout 172.9 billion sends, that’s a fee of roughly 0.15%. Retail generated 37.4 million unsubscribes on simply 8.08 billion sends, a far greater fee per e-mail. Uncooked unsubscribe quantity with out ship quantity context is meaningless.
89% of senders say deliverability is vital to their group. 43% say their inbox placement improved within the final 12 months. The infrastructure progress is actual: DMARC adoption has grown from 43% in 2023 to 61% in 2025, pushed by necessities from Gmail, Yahoo, and Microsoft. For the primary time in Mailgun’s analysis, enforcement is outpacing passive monitoring, with over half of DMARC adopters now utilizing quarantine or reject insurance policies.
However the understanding hasn’t saved up. 36% of senders declare to observe their “e-mail deliverability fee,” a metric that doesn’t exist. The supply fee measures emails accepted by the server, together with these filtered to spam. Inbox placement measures what truly reached the inbox. Solely 25% of senders run inbox placement assessments to seek out out, and 27% of DMARC customers don’t know what coverage they’ve in place. The instruments are bettering. The literacy round them shouldn’t be.
AI adoption is large. AI impression is uneven.
79% of senders use or plan to make use of AI of their e-mail packages. However common use sits at simply 27%, and a good portion of adopters are nonetheless experimenting fairly than systematically integrating AI into their workflows.
The commonest use case is copy technology at 41%, adopted by content material personalization (36%), dynamic content material (29%), ship time optimization (27%), and information evaluation (27%). The sample is obvious: AI delivers probably the most worth when it’s embedded in decision-making, not simply content material manufacturing. Groups utilizing AI for personalization, timing, and testing report compounding returns. Groups utilizing it solely to draft topic strains see restricted impression.
The headline discovering: 54% of senders utilizing AI report that their e-mail packages improved in 2025. Amongst non-AI customers, 37% say the identical. That 17-point hole is the clearest sign but that AI is starting to separate e-mail packages by efficiency tier. It doesn’t show causation, however the course is constant.
23% of AI customers say it has not helped them in any respect. The distinction between these seeing worth and people not shouldn’t be the instrument. It’s the depth of integration.
17-point hole in e-mail program enchancment charges between senders utilizing AI (54%) and those that will not be (37%)
The place e-mail funding is heading
31% of organizations plan to extend their e-mail funding in 2026. 48% plan to take care of present spending. “Benefiting from AI” and “growing e-mail engagement” are tied as the highest priorities, every cited by 40% of senders.
The report’s conclusion is simple: e-mail works. The information helps that throughout ROI, benchmarks, and deliverability traits. However the packages that can pull forward are these investing in three areas concurrently: measurement (proving ROI with actual information), deliverability (constantly reaching the inbox via authentication, hygiene, and monitoring), and optimization (utilizing AI and testing to enhance efficiency at scale).
None of those requires an enormous finances to start out. All of them compound over time.
