Mastering Email Deliverability: The Modern Guide to Authentication and Inbox Warm-Up

In the world of emails, getting your message seen is just as important as crafting the perfect copy. But even the most well-written email is worthless if it never makes it to the inbox. That’s where email warm-up and authentication come into play—and why understanding their intersection is no longer optional. However, the email landscape […]
Cómo dominar la entregabilidad global del correo electrónico en 2025

En el mundo interconectado de hoy, el correo electrónico como canal de comunicación es un arma de doble filo. Es fácil, rápido y permite a las empresas conectarse con múltiples clientes al mismo tiempo. Pero algunos comportamientos especÃficos a la hora de enviar correos, combinados con otros factores técnicos, pueden llevar a que las empresas […]
Cracking the Code: Why Emails Land in Gmail’s Promotions Tab

Once upon a time, Gmail’s inboxes were a mishmash of personal emails, work emails, transactional emails and so on. Then in 2013, Gmail introduced the tabbed inbox and everything changed. If users choose to activate this setting, they will be giving permission to Gmail to decide which emails will go to respective tabs based on […]
Understanding ESP Blocks: Causes, Types, and Prevention

Predictions show that by 2027, there will be 408.2 billion emails sent per day. What does this mean? It shows how big a role email has in everyday life. For businesses and individuals depending on email as primary means of communication, the ability to land in the inbox is everything. That being said, email deliverability […]
The Science and Process of Warming Up Newly Created Email Domains

Crafting effective marketing email content is just one of the fundamentals that can make an effective email outreach successful. In the realms of email marketing the technical aspects are just as crucial as the marketing ploy; our research team devoted their time to understanding the best and most helpful technical factors that can help every […]
The Email Deliverability Playbook: 5 Key Trends That Will Define Inbox Success in 2025

Welcome to the new email landscape where email deliverability has never been more important—or more complex. With inbox providers tightening their rules, AI-driven filters evolving fast, and new privacy laws rolling out across the globe, what worked last year simply won’t cut it in 2025. The Warmy.io Research Team created this guide: to give Warmy […]
The Fastest Path to Yahoo Inboxes: Analyzing SMTP Providers for Optimal Delivery

The Warmy Research Team conducted an experiment to uncover which among different SMTP providers result in a faster delivery to Yahoo inboxes.
Signature Showdown: Crafting the Perfect Email Signature for Maximum Deliverability

In a world where email marketers compete for open rates, click-through rates, and conversions, the email signature may easily be overlooked. Or it may even be a last-minute addition. However, did you know it could actually be the difference between your email landing in the inbox or getting lost in the spam folder? The battle […]
Outlook Seed Lists & MS365 Deliverability: The Battle Between New and Established Lists

Today, ensuring your messages land in the inbox (not the spam folder) is considered a crucial business aspect. Email marketers, sales teams, and businesses rely on high email deliverability to maximize engagement, build trust, and drive conversions. However, reaching the inbox consistently is no easy feat, especially when dealing with complex email filtering systems like […]
Maximizing Email Deliverability: Grouped vs. Randomized Sending

Many organizations suffer the pain of emails ending up in spam folders or being throttled—often because sending practices are widely inconsistent with Outlook 365’s spam filters. At Warmy, our research team continues to do more by figuring out how to get more of your emails delivered, straight to your intended inbox. Our ongoing testing and analysis […]