A good newsletter open rate is one that holds steady or rises against your own recent sends, not one that clears a single industry figure. Published averages disagree because they measure different senders over different years: Mailchimp's benchmark page lists 35.63% for all users from data last updated in December 2023, while MailerLite's benchmark report gives a median of 43.46% for campaigns sent from December 2024 to November 2025. Because Apple Mail Privacy Protection can register an open when nobody read the email, use opens as a trend line and judge engagement mainly on clicks, replies, unsubscribes and spam complaints.
How an open is counted
An open is not the same as a person reading. beehiiv's diagnostic guide to declining open rates explains that an open is counted when the email client loads a tiny invisible tracking pixel, and that pixels get loaded by people, privacy tools, spam filters and mailbox prefetching systems alike. The mechanism misses real readers too: beehiiv's guide to open rate declines notes that an email read with images blocked, or in plain text, records no open at all.
- Unique versus total opens. Unique opens count each recipient once, while total opens count every load, rereads included. beehiiv says it calculates open rate on unique opens, the steadier of the two.
- Gmail's image proxy. The same diagnostic guide says Gmail fetches images through Google's own servers and caches them, so repeat opens in the same app often go unrecorded.
- The denominator. beehiiv's Posts Report article defines open rate as emails opened divided by emails delivered, so bounced addresses are left out of the calculation.
Why Apple Mail Privacy Protection inflates opens
Apple's Mail Privacy Protection page says Protect Mail Activity downloads remote content in the background by default when a message arrives, regardless of whether the person engages with it, and routes that content through two separate relays so senders cannot see the reader's IP address. The tracking pixel is remote content, so an Apple Mail user can appear to open an email they never looked at. Apple's iPhone user guide adds that the feature prevents senders from seeing whether you opened their message, and that it does not extend to links or attachments, which is why clicks remain a firmer signal.
The size of the effect depends on how many of your readers use Apple Mail, and it has shifted over time. beehiiv's diagnostic guide says Apple has pre-loaded tracking pixels since September 2021, inflating the baseline across the industry, and that from April 2024 Apple began adjusting when prefetching happens, which reduced recorded opens even where real engagement had not changed. Mailchimp's help article about open and click rates warns that bot activity such as Mail Privacy Protection can falsely inflate open and click metrics and recommends excluding it from reports. MailerLite's report also observes that Australia, the US and Canada all have high iPhone ownership, which could push more emails into the opened column.
Published benchmarks, with their dates
If you compare against a benchmark at all, use one whose sample and date you know. These are the figures as printed on the pages checked on 1 October 2026:
| Page | Figures printed | Sample and date | Source |
|---|---|---|---|
| Mailchimp benchmarks, all users | 35.63% average open rate, 2.62% click rate and 0.22% unsubscribe rate | Campaigns sent to at least 1,000 subscribers; data last updated December 2023 | Mailchimp email marketing benchmarks |
| Mailchimp benchmarks, FAQ section | A suggestion to aim for somewhere around 34.23% | The same page, with no separate sample described | Mailchimp benchmarks FAQ |
| Mailchimp email reporting guide | An average open rate of 21.33% across all industries | No date or sample stated on the page | Mailchimp email reporting metrics |
| MailerLite report, all industries | 43.46% median open rate, 2.09% click rate and 0.22% unsubscribe rate | 3.6 million campaigns from 181,000 approved accounts, December 2024 to November 2025 | MailerLite industry benchmarks |
| MailerLite report, Australia | 2.82% click rate and 8.30% click-to-open rate | The Australian slice of the same MailerLite dataset | MailerLite regional benchmarks |
Mailchimp's own pages disagree with each other, which is the clearest reminder that a benchmark is only as useful as its date and method. Mailchimp's benchmark page adds a disclaimer that Apple's privacy changes may affect the accuracy of open rates, and MailerLite reports medians rather than averages. None of these figures adjusts for your share of Apple Mail readers, your niche, your list's age or whether your platform filters machine opens, so treat them as background rather than as targets.
Measures that hold up better than opens
- Click rate. Unique clickers divided by delivered emails. MailerLite's report calls click rate the most accurate current indicator of newsletter engagement because it does not depend on tracking opens.
- Click-to-open rate. Check which denominator your platform uses. beehiiv's post analytics walkthrough describes it as clicks divided by opens, while its Posts Report article defines it as subscribers who clicked divided by emails delivered, which is really a click rate.
- Filtered clicks. Security scanners can click links too. beehiiv's Verified Clicks screen out likely bot clicks using signals such as IP addresses, user agents and click patterns, and other platforms offer similar filters.
- Replies. A reply needs a person behind it, so count them per issue even when the numbers are small.
- Unsubscribe rate. Unsubscribes divided by delivered emails, watched for sudden jumps after a change of topic, frequency or traffic source.
- Spam complaints. Google's email sender guidelines tell senders to keep spam rates reported in Postmaster Tools below 0.10% and to avoid ever reaching 0.30%, and Yahoo's sender best practices ask all senders to keep their spam rate below 0.3%.
Engagement health-check worksheet
Set your own thresholds by comparing each send with the average of your recent sends, then recheck the worksheet once a month. The thresholds column is deliberately left for you to fill in.
| Metric | How to calculate | Your threshold | If it slips |
|---|---|---|---|
| Delivery rate | Delivered emails divided by emails sent | A floor based on your recent sends | Check bounces, domain authentication and any recent imports |
| Unique open rate | Unique opens divided by delivered, read only as a trend | Watch the direction rather than the level | Compare with clicks before reacting, then test subject lines and send times |
| Unique click rate | Unique clickers divided by delivered | Your recent average minus a margin you choose | Review the main link's position, wording and relevance to the issue |
| Click-to-open rate | Clickers divided by unique opens, or as your platform defines it | Your own recent average | Rework the body and calls to action rather than the subject line |
| Unsubscribe rate | Unsubscribes divided by delivered | Your recent average plus a margin you choose | Look for what changed: topic, frequency, ads or a new sign-up source |
| Spam complaint rate | Complaints divided by delivered, plus Postmaster Tools for Gmail readers | Below the 0.10% level in Google's sender guidelines | Pause sends to recently imported contacts and check their consent records |
| Replies per issue | A simple count from your inbox | Your own baseline | Ask one direct question near the top of the next issue |
| Cold share | Inactive subscribers divided by all confirmed subscribers | A level you are comfortable paying to keep | Run a re-engagement email, then remove the people who stay silent |
List-cleaning checklist
- Define inactive using clicks as well as opens. Kit's subscriber status article is a useful model: it treats subscribers active for more than 90 days as cold after 90 days without an open or click, and newer subscribers after 30 days.
- Exclude machine opens from reports wherever your platform allows it, as Mailchimp recommends for Apple Mail Privacy Protection and other bot activity.
- Send inactive subscribers a short email asking whether they want to stay; Yahoo's best practices suggest periodically sending a reconfirmation email to inactive subscribers.
- Remove or suppress anyone who does not respond within the window you set, and keep a dated export recording who was removed and why.
- Let hard-bouncing addresses drop off and do not add them back later.
- Never re-import people who unsubscribed. Kit's post-import troubleshooting guide says it will not reactivate previously unsubscribed addresses included in an import.
- Remember that inactive readers can still cost money: Kit says cold subscribers remain confirmed and count towards your billing total.
- Add only people who signed up themselves; the consent rules in our guide to building an email list you own apply to every address on the list.
If your open rate suddenly drops
A sharp fall in opens is worth investigating, but not every fall means fewer people are reading. Work through these checks before rewriting anything:
- See whether clicks fell at the same time. beehiiv's diagnostic guide suggests that a drop confined to Apple addresses, with clicks holding steady, is most likely a tracking artefact rather than a placement problem.
- Split results by mailbox provider if your platform allows it, since Gmail, Outlook, Yahoo and Apple Mail each change how they load images and sort mail.
- Check whether a new sign-up source, an import or a giveaway brought in a batch of readers who never engage.
- Look for a jump in spam complaints or bounces, which can push future sends towards the spam folder.
- Remember inbox layout changes: the same beehiiv guide reports that Gmail switched its Promotions tab from chronological to relevance-based sorting in September 2025, so less-engaged senders can sit lower in the feed.
What this means if you sell ads
Inflated opens matter most when money is priced on them. beehiiv's Ad Network guide says CPM offers pay on unique opens from email sends, so a list heavy with Apple Mail readers can look more valuable on opens than on clicks. If you sell sponsorships directly, tell sponsors exactly which numbers you report, whether opens are filtered, and consider pricing on clicks or a flat fee. Our guide to newsletter sponsorship rates sets out the maths for each model, and our newsletter growth guide covers attracting readers who click.
Limitations of this guide
The benchmarks were read on 1 October 2026 and describe other senders' lists, platforms and years, so they are context rather than targets. Platforms count opens and clicks differently, filter machine activity to different degrees and sometimes use different denominators for the same metric name, which makes any comparison between your number and another platform's figure approximate at best.
The worksheet thresholds are yours to set; this page cannot say what a healthy figure is for your niche or audience. Deliverability rules belong to the mailbox providers and consent rules to regulators, and both change. If complaint rates rise sharply or emails stop arriving, contact your platform's support before sending again.