Reverse DNS Lookup Failures How They Impact Email Deliverability and Sender Trust
Email is a valuable communication channel, especially for many businesses and email marketers. It is known to develop the highest ROI, which should make inbox placement and email deliverability a priority.  The capability to ensure that your emails are delivered to the intended recipient is a simple idea, yet there are still some email users […]
Why SSL & TLS Certificate Errors Are Hurting Your Email Deliverability
If you are an email marketer, you probably understand that having the best email and domain setup are one of the fundamentals to ensure that you have a functioning email. However, one factor that can still affect your email deliverability and overall reputation are errors caused by SSL (Secure Sockets Layer) and TLS (Transport Layer […]
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 […]
SSL and TLS Certificate Errors in Email Servers: How They Impact Deliverability
What if you were to send an important email—a client proposal, let’s say, or a security update, or internal memo—and it was rejected, marked as spam, or even intercepted? That’s where SSL/TLS encryption comes in. These protocols secure email traffic through data encryption and confirmation of the authenticity of mail servers. But SSL/TLS encryption doesn’t work […]
The Challenges of SMTP over IPv6: What You Need to Know Before Transitioning
SMTP (Simple Mail Transfer Protocol) has been the staple of email communication for the last couple of decades—forwarding messages over networks via the Internet Protocol, which has, until recently, been IPv4. But exhaustion of IPv4 addresses is gradually pushing businesses and email service providers to think about moving to SMTP over IPv6. It provides a nearly infinite […]
SMTP over IPv6: The Future of Email Servers and What It Means for Deliverability
The Simple Mail Transfer Protocol (SMTP)’s primary role is to make sure messages take the right path from senders to recipients. But with the world reeling with the internet boom, the traditional IPv4 system reached a point where it could no longer keep up. IPv4, the internet’s original addressing method, only has a limited number of […]
How to Boost Brand Recognition and Email Deliverability
While email marketing plays a key role in brand building, it has become more challenging than ever. Emails may go unnoticed among the others in the inboxes. Then there are phishing and spoofing attempts. And yes, the infamous spam folder and a thousand other challenges that businesses tackle every day. BIMI (Brand Indicators for Message Identification) […]
Why Implementing BIMI is a Game-Changer for Your Brand
In 2024, the number of sent and received emails reached 361.5 billion. Can you believe it? And this 2025, it is estimated to be 376.4 billion. The point is, you cannot make sure your email is seen, much less read. Assuming your email gets to the inbox at all, and there’s no guarantees of that either. That is […]
Maximizing Cold Email Impact: Social Proof and Email Deliverability
Can you remember the last thing you wanted to buy? Take a minute to think back to the moment leading up to the actual purchase. What did you do first? Chances are, you talked to people who made similar purchases. But knowing that someone bought the same thing (and is happy with their decision) is […]
What Is DNS Propagation and How to Minimize Its Impact on Email Deliverability
DNS records undergo modifications — such as SPF, DKIM, DMARC, MX, A records, or PTR records. These updates or modifications should propagate across global DNS servers, caching information a certain period before it refreshes. These modifications should not take longer than a few minutes to 48 hours. For rare and unusual circumstances these can take […]
