25 Email Marketing Tactics That No Longer Work in 2026
Email marketing has changed dramatically over the past few years. Here are 25 tactics that once worked—but now hurt performance, waste time, or simply no longer deliver results.
Average Email Length by Industry: What the Data Actually Shows
How long should a marketing email be? We analysed industry research, campaign data, and best practices to understand how email length varies across industries—and when shorter or longer emails perform better.
We Tested 100 Subject Lines Here's What We Learned
We analysed 100 email subject lines across seven psychological categories to understand what makes people open emails. Discover the patterns, examples, and practical takeaways you can apply to your next campaign.
Why Are My Emails Going to Spam? (17 Common Reasons)
If your emails are landing in spam, it is rarely one thing. It is usually a combination of authentication, reputation, content signals, and engagement. This guide breaks down the 17 most common reasons emails go to spam and how to fix them.
What Triggers Email Client Spam Filters?
Most marketers think spam filters look for words like 'FREE' or 'BUY NOW'. Modern spam filtering is far more sophisticated. Here is what actually causes marketing emails to land in spam.
Email Marketing: What Changed in the Last 12 Months
Beyond the AI headlines, quieter shifts have been reshaping email marketing behind the scenes. Here is what actually changed over the past year.
How to Calculate Your Email Unsubscribe Rate (And When to Worry)
A rising unsubscribe rate can be an early warning sign that something is wrong with your email marketing. Learn how to calculate unsubscribe rate, understand what's normal, and know when action is needed.
Welcome Email Series: The 5 Emails Every New Subscriber Should Get
Most businesses focus on getting subscribers but neglect what happens after signup. Here's the 5-email welcome sequence that builds trust, engagement, and conversions.
Gmail's AI Inbox Is Changing Email Marketing: How to Optimize Emails for AI Summaries
Gmail, Apple, and other email providers are increasingly using AI to summarize messages before people read them. Here's how email marketers can adapt.
How to Write a Re-engagement Email (With Examples That Actually Work)
Most re-engagement emails are too polite, too vague, or too late. Here's how to write one that actually wins subscribers back - and how to know when to stop trying.
How to Write a Weekly Email Newsletter People Actually Look Forward To
Most weekly newsletters feel like obligations — to write and to read. Here's how to build one subscribers genuinely want in their inbox every week.
Email Engagement Isn’t Declining: Attention Per Email Is
Email marketing isn’t failing: attention is fragmenting. Learn why engagement metrics are misleading and how attention per email is becoming the real performance indicator.
Resending Emails to Non-Openers: The Hidden Deliverability Cost
Resending emails to non-openers can recover clicks, but repeated second sends can also damage deliverability, increase fatigue, and weaken long-term engagement.
Why Better Content Filters Are the Future of Newsletter Strategy
Audiences are not short of content. They are short of clarity. The newsletters that win help readers filter noise, understand what matters, and act faster.
Most Newsletters Fail Because They Have No Point of View
Most newsletters don't fail because of bad design or weak deliverability. They fail because they sound exactly like every other email in the inbox.
Why High-Performing Emails Often Look Surprisingly Simple
Many of the highest-performing emails don't look impressive at all. In overloaded inboxes, simplicity often outperforms complexity because it reduces cognitive friction and feels easier to engage with immediately.
Your Emails Are Now Being Read by AI Before Humans
AI inboxes, email summaries, and machine-generated previews are changing email marketing faster than most marketers realize. Discover why clarity now beats persuasion and how AI is quietly becoming your first audience.
Why Some Emails Feel ‘Heavy’ Before You Even Open Them
Subscribers subconsciously estimate how mentally demanding an email will be before they even open it. In overloaded inboxes, perceived effort often determines whether an email gets attention or postponed indefinitely.
Why People Intend to Read Your Emails Later (But Rarely Do)
Most ignored emails aren't consciously rejected. They're mentally deferred, forgotten, buried, and eventually abandoned. 'I'll read this later' is often just a softer version of delete.
Your Emails Aren’t Competing With Businesses — They’re Competing With Humans
Most marketers think their emails compete against other brands. In reality, they compete against group chats, notifications, social feeds, work stress, and human attention itself.
How Long Does a Subscriber Stay Valuable?
Not all subscribers are equal—and more importantly, they don't stay equal forever. Over time, engagement fades, behaviour changes, and value declines. Understanding this lifecycle is the key to better email strategy.
What Happens If You Stop Sending Emails for 30 Days?
It seems harmless—skip a few campaigns, take a break, nothing drastic. But under the surface, your email list starts to change fast. Engagement drops, behaviour shifts, and recovery isn't as simple as sending one email.
The First 24 Hours: Where 90% of Email Performance Is Decided
Most email campaigns win or lose in the first 24 hours. Learn what actually happens after you hit send—and how to optimise for early engagement and better results.
Nobody Reads Your Emails (And That's Not the Problem)
Harsh truth: most people don't actually read your emails. But that's not why your campaigns are underperforming.
The Average Email Is Read for Less Than 9 Seconds — Here’s How to Win Anyway
You don’t have minutes to convince your reader — you have seconds. Here’s how to write emails people actually pay attention to.
Behavioural Email Metrics: What Your Subscribers Do After Opening That Actually Predicts Outcomes
Learn which subscriber behaviors after opening emails actually predict engagement, conversions, and long-term performance, beyond clicks and opens.
Inbox 2.0: How AI Is Changing What Gets Opened, Clicked, and Ignored
AI is transforming the inbox—emails are now sorted, summarised, and prioritised by intelligent algorithms. Learn what marketers must do to adapt in 2026.
Email Personalization: 12 Ways to Increase Click Rates
Email personalization goes far beyond using a subscriber’s first name. Learn 12 proven strategies to personalize email campaigns and dramatically increase engagement and click-through rates.
The Perfect Email Length
How long should marketing emails actually be? Discover the ideal email length based on real data and see examples of short SaaS, ecommerce, and newsletter emails.
Plain Text vs HTML Emails: Which Performs Better?
Should marketers send simple plain text emails or fully designed HTML campaigns? Discover the pros, cons, and performance differences.
The Psychology Behind Emails People Actually Click
Why do some emails get ignored while others drive clicks instantly? Discover the psychological triggers behind high-performing email campaigns.
Session Depth & Behavioural Tracking From Email: The Analytics Most Teams Ignore
Opens and clicks only tell part of the story. Learn how to analyse session depth, behavioural segments, and post-click engagement patterns to understand what email subscribers actually do after they land on your site.
5 Hidden Metrics Most Email Marketers Ignore (and Why They Matter)
Most email marketers focus on opens and clicks — but are missing the metrics that reveal real engagement and ROI. Discover 5 hidden email metrics and how to track them effectively.
How Many Emails Should You Send Per Week?
Not sure how often you should email your subscribers? Learn the ideal email marketing send frequency based on data, audience type, and engagement performance — and how to find your perfect cadence.
Email Marketing KPIs: What You Should Track (And Why) - 2026 Guide
Discover the most important email marketing KPIs, how to align them with business goals, and why tracking the right indicators can drive revenue, engagement, and retention.
How Did Your Email Marketing Campaign Perform This Month?
Learn how to measure, analyze, and improve your email marketing campaign performance with actionable tips, advanced analytics, and proven strategies for higher engagement and ROI.
How Often Should You Check Email Marketing Metrics?
Checking email metrics too often creates noise, too rarely hides problems. Learn how often you should review email marketing metrics and which numbers to track daily, weekly, or monthly.
Email List Growth & List Health Metrics: How to Track and Improve Them
Discover how to measure and improve your email list growth and health. Track key metrics like churn, engagement, and bounce rate to maximize campaign performance and deliverability.
Why Email Open Rate Is a Misleading Metric (And What to Track Instead)
Discover why email open rate has become unreliable in 2026. Learn how Apple Mail Privacy Protection and email client fragmentation make open rates misleading, and which metrics to track instead for real engagement insights.