The Blog

Insights from the
front lines of email

Expert advice on deliverability, marketing automation, and building email experiences that convert.

The Psychology of the Subject Line: Why We Click
Marketing
Andreas Hatlem5 min read

The Psychology of the Subject Line: Why We Click

You have 3 seconds to earn a click. We explore the cognitive biases like Curiosity Gaps and Loss Aversion that master copywriters use to win the inbox.

Read article
Latest Articles
How to Clean Your Email List Without Losing Customers: The Art of the Sunset
Marketing
5 min read

How to Clean Your Email List Without Losing Customers: The Art of the Sunset

Deleting 30% of your list sounds terrifying. We explain why it's the smartest move you can make for your reputation and how to automate the 'Sunset' process.

Andreas Hatlem
The Rise of Transactional SMS: Why Email Needs a Partner
Marketing
5 min read

The Rise of Transactional SMS: Why Email Needs a Partner

Don't rely on just one channel. We explore how to build 'Fallback Flows' where SMS steps in when email is ignored, boosting your effective reach.

GetMailer Team
The Missing Link: Connecting Claude to Your Inbox with GetMailer's MCP
Engineering
5 min read

The Missing Link: Connecting Claude to Your Inbox with GetMailer's MCP

LLMs are trapped in the chat box. We explain how the Model Context Protocol (MCP) gives them hands, and why GetMailer is the perfect email layer for the agentic future.

GetMailer Engineering
Vibecoding the Inbox: Why Your AI Assistant Loves GetMailer
Engineering
5 min read

Vibecoding the Inbox: Why Your AI Assistant Loves GetMailer

Stop debugging SMTP and start building. Learn why 'Vibecoding' requires a new kind of email infrastructure and how GetMailer fits the AI-first workflow.

Andreas Hatlem
Cursor + GetMailer: The 30-Second Email Integration
Engineering
5 min read

Cursor + GetMailer: The 30-Second Email Integration

The days of context-switching are over. Learn how to configure Cursor to write production-ready GetMailer code with a simple .cursorrules file.

Andreas Hatlem
The Future of Inbox: 7 Essential Email Marketing Strategies for 2026
Marketing
5 min read

The Future of Inbox: 7 Essential Email Marketing Strategies for 2026

The rules of the inbox have changed. From AI-driven personalization to the rise of verified trust with BIMI, here are the 7 strategies you need to master for 2026.

GetMailer Team
The Technical Guide to BIMI Implementation: Earning Your Blue Tick
Deliverability
5 min read

The Technical Guide to BIMI Implementation: Earning Your Blue Tick

BIMI puts your logo in the inbox, but the technical requirements are strict. Learn about SVG Tiny 1.2, DMARC enforcement, and how to get your Verified Mark Certificate.

GetMailer Engineering
The Science of Adaptive Sending: Optimizing Engagement with Probability
Engineering
6 min read

The Science of Adaptive Sending: Optimizing Engagement with Probability

Stop blasting emails at 10 AM. Learn how GetMailer's adaptive sending engine uses historical engagement data and probability models to deliver emails when your users are actually looking at their inbox.

Andreas Hatlem
Metrics That Actually Matter: Deep Diving into Campaign Analytics
Engineering
5 min read

Metrics That Actually Matter: Deep Diving into Campaign Analytics

Stop declaring A/B test winners based on luck. We explain how our Chi-Square testing works and why you need to look beyond the Open Rate.

Andreas Hatlem
Beyond Open Rates: Using Predictive Reputation to Preempt Deliverability Issues
Deliverability
5 min read

Beyond Open Rates: Using Predictive Reputation to Preempt Deliverability Issues

Most senders find out they're blacklisted when bounces skyrocket. GetMailer's Predictive Reputation system analyzes trends to warn you days before a threshold breach.

Andreas Hatlem
Why Test Mode Is Non-Negotiable for Modern Email
Engineering
5 min read

Why Test Mode Is Non-Negotiable for Modern Email

We nearly sent a million emails in staging. That is why Test Mode is a hard safety barrier, not a feature toggle.

Andreas Hatlem
The Authentication Trinity: A Technical Guide to DMARC, SPF, and DKIM Implementation
Security
8 min read

The Authentication Trinity: A Technical Guide to DMARC, SPF, and DKIM Implementation

SPF, DKIM, and DMARC aren't optional anymore. Since Google and Yahoo's 2024 updates, they are mandatory for survival. Here is exactly how to set them up.

Andreas Hatlem
Automating User Engagement: A Guide to Smart Email Workflows
Marketing
5 min read

Automating User Engagement: A Guide to Smart Email Workflows

Move beyond basic newsletters. Learn how to build behavioral email workflows that nurture leads and retain customers automatically.

Marketing Team
The Art of the Goodbye: How Automated Sunsetting Saved Our Deliverability
Engineering
5 min read

The Art of the Goodbye: How Automated Sunsetting Saved Our Deliverability

Sending to unengaged users is the fastest way to the spam folder. We explain our prioritized queuing system and why we send to your 'Fan Club' first.

Andreas Hatlem
Webhooks That Do Not Drop Events
Engineering
5 min read

Webhooks That Do Not Drop Events

Your event pipeline should be boring and predictable. Here is how we handle retries, signatures, and delivery windows.

Andreas Hatlem
Mastering Email Deliverability: The Ultimate Guide to Inbox Placement
Deliverability
5 min read

Mastering Email Deliverability: The Ultimate Guide to Inbox Placement

Stop landing in spam. Discover the technical and strategic secrets to achieving 99% inbox placement with proper authentication and warming strategies.

Technical Team
Stop Guessing: Why We Built Inbox Placement Testing into the Core
Deliverability
5 min read

Stop Guessing: Why We Built Inbox Placement Testing into the Core

Don't wait for the campaign report to find out you landed in Spam. We explain how our seed list testing works and why it's your best defense against the junk folder.

Andreas Hatlem
Inbound Email: The Playbook for Reply-Driven Workflows
Marketing
5 min read

Inbound Email: The Playbook for Reply-Driven Workflows

Inbound email unlocks the workflows you cannot build with outbound alone. Here is how we parse, extract, and route replies.

Andreas Hatlem
Why We Chose React for Email: Bringing Sanity to HTML Tables
Engineering
5 min read

Why We Chose React for Email: Bringing Sanity to HTML Tables

We ditched the drag-and-drop builder for code. Learn how React Email components, version control, and real-time previews make email development a joy.

Andreas Hatlem
Email Validation at the Door: Why List Hygiene Wins
Deliverability
5 min read

Email Validation at the Door: Why List Hygiene Wins

Validation is not glamorous, but it protects your sender reputation. Here is how we score risk and stop bad addresses early.

Andreas Hatlem
The Boring Technology Behind Our Scaling Strategy
Engineering
5 min read

The Boring Technology Behind Our Scaling Strategy

We don't use Kubernetes for everything. Learn why our 'boring' worker architecture is the secret to our 99.99% uptime and reliability.

Andreas Hatlem
Security Is Not an Upsell: Why We Give Audit Logs to Everyone
Security
5 min read

Security Is Not an Upsell: Why We Give Audit Logs to Everyone

We don't put security behind a paywall. Learn about our granular role-based access control and why we log every single action your team takes.

Andreas Hatlem
The Complete Guide to Transactional Email Best Practices
Best Practices
18 min read

The Complete Guide to Transactional Email Best Practices

Transactional emails are critical to your business. Learn the best practices for designing, sending, and monitoring transactional emails that users actually receive and engage with.

GetMailer Team
Email Deliverability Optimization: The Complete Guide to Reaching the Inbox
Deliverability
20 min read

Email Deliverability Optimization: The Complete Guide to Reaching the Inbox

Deliverability is the foundation of email success. Learn how ISPs make filtering decisions and what you can do to ensure your emails reach their intended recipients.

GetMailer Team
SMTP Configuration and Setup: A Developer's Complete Guide
Infrastructure
18 min read

SMTP Configuration and Setup: A Developer's Complete Guide

SMTP is the protocol that powers email delivery. Learn how to properly configure SMTP servers, understand the protocol, and integrate SMTP into your applications.

GetMailer Team
Email Authentication Explained: SPF, DKIM, and DMARC Complete Guide
Security
22 min read

Email Authentication Explained: SPF, DKIM, and DMARC Complete Guide

Email authentication prevents spoofing and improves deliverability. Learn how SPF, DKIM, and DMARC work together to secure your email sending and protect your brand.

GetMailer Team
Email Template Design Best Practices for Transactional Email
Best Practices
19 min read

Email Template Design Best Practices for Transactional Email

Great email design balances aesthetics with technical constraints. Learn how to create email templates that look great across all clients while maintaining deliverability.

GetMailer Team
Email API Integration: Building Robust Email-Sending Applications
Infrastructure
20 min read

Email API Integration: Building Robust Email-Sending Applications

Modern email sending uses APIs for flexibility, reliability, and features. Learn how to integrate email APIs properly, handle errors gracefully, and build resilient email-sending systems.

GetMailer Team
Email Bounce Handling: The Complete Management Guide
Deliverability
18 min read

Email Bounce Handling: The Complete Management Guide

Bounces are inevitable, but poor bounce handling destroys deliverability. Learn how to classify, process, and act on bounces to maintain a healthy email program.

GetMailer Team
Email Analytics and Tracking: Measuring What Matters
Best Practices
17 min read

Email Analytics and Tracking: Measuring What Matters

Email analytics reveal how your messages perform. Learn which metrics matter, how tracking works, and how to use data to improve your email program.

GetMailer Team
Sender Reputation Management: The Key to Email Deliverability
Deliverability
18 min read

Sender Reputation Management: The Key to Email Deliverability

Sender reputation determines whether your emails reach the inbox or spam folder. Learn how reputation works, what damages it, and how to maintain excellent standing with ISPs.

GetMailer Team
Scaling Email Infrastructure: From Thousands to Millions of Emails
Infrastructure
19 min read

Scaling Email Infrastructure: From Thousands to Millions of Emails

As your business grows, email volume grows too. Learn how to scale email infrastructure to handle millions of messages reliably, efficiently, and cost-effectively.

GetMailer Team
IP Warmup Strategies: Building Reputation for New Sending IPs
Deliverability
18 min read

IP Warmup Strategies: Building Reputation for New Sending IPs

New IP addresses have no reputation and need careful warmup. Learn the strategies and schedules for building trust with ISPs and achieving optimal deliverability.

GetMailer Team
HTML Email Coding: The Developer's Complete Reference
Best Practices
20 min read

HTML Email Coding: The Developer's Complete Reference

HTML email development is nothing like web development. Learn the techniques, workarounds, and best practices for coding emails that render correctly across all clients.

GetMailer Team
Email Testing and QA: Ensuring Every Email Works Perfectly
Best Practices
18 min read

Email Testing and QA: Ensuring Every Email Works Perfectly

Testing emails is more complex than testing web pages. Learn the tools, techniques, and processes for thoroughly testing emails before they reach recipients.

GetMailer Team
Email Compliance: CAN-SPAM, GDPR, and International Regulations
Compliance
20 min read

Email Compliance: CAN-SPAM, GDPR, and International Regulations

Email compliance is not optional. Understand the requirements of CAN-SPAM, GDPR, and other regulations to send email legally and avoid costly penalties.

GetMailer Team
Email Security Best Practices: Protecting Your Email Infrastructure
Security
19 min read

Email Security Best Practices: Protecting Your Email Infrastructure

Email is a common attack vector. Learn how to secure your email infrastructure, prevent abuse of your sending systems, and protect sensitive information in transit.

GetMailer Team

Stay in the loop

Get the latest articles and expert insights delivered straight to your inbox. No spam, ever.

Join 2,000+ developers and marketers