In this blog post category, we cover factors affecting email deliverability.
When a new domain sends its first email, inbox providers like Gmail, Outlook, and Yahoo face a simple problem: they have no data on you. No sending history. No engagement record. No signals that tell them whether you are a legitimate business communicating with people who want to hear from you, or a spammer who … Read more
There is a particular kind of deliverability problem that is harder to diagnose than most. Your campaign goes out, engagement drops sharply, bounce rates spike, and when you look at the bounce message text, you see something like “550 5.7.1 – message rejected per policy” or a reference to Spamhaus or Barracuda. Your domain or … Read more
If you send more than 5,000 emails a day to Gmail or Yahoo inboxes, your emails are now being actively checked against a set of DNS-based authentication standards before they’re allowed anywhere near the inbox. Gmail and Yahoo made this mandatory in February 2024. Microsoft followed with its own enforcement in May 2025. This is … Read more
A founder’s technical guide to the platforms that actually determine whether your emails get delivered. Your verified list is still landing in spam. We see it every month: agencies with clean data, decent copy, and reasonable targeting that cannot figure out why reply rates are declining. The answer, almost every time, is infrastructure. We run … Read more
When an email doesn’t reach its destination, your sending platform doesn’t just tell you it failed. It hands you a three-digit number – and in that number is everything you need to know about what went wrong and what to do next. The problem is that most email marketers don’t speak SMTP. They see a … Read more
If your bounce rate is higher than it should be, you already know something is wrong. What you might not know yet is exactly what to do about it – and in what order. That’s the gap this guide fills. Here’s the thing most bounce rate guides miss entirely. How to fix email bounce back … Read more
You send a campaign. Everything looked right – the copy was good, the timing was solid, the list had been sitting in your ESP for months. Then the report comes back and there it is: a bounce rate you weren’t expecting. So why do emails bounce? And more importantly – what are you supposed to … Read more
Email bounce management is rarely discussed until something breaks. Not because bounces are uncommon. But because most teams treat them as routine noise inside campaign reports. The difference between average senders and mature sending organizations isn’t whether bounces happen. They always do. The difference is whether bounce behavior is governed. At scale, bounced emails aren’t … Read more
Email bounce rate is the percentage of emails that never reach the recipient’s inbox. On paper, it sounds like a simple delivery metric. In reality, what happens when email bounce rate is high goes far beyond numbers in a dashboard. When emails bounce consistently, inbox providers stop trusting us. First, deliverability weakens. Then, sender reputation … Read more
If you are sending emails regularly, one question will always matter: Are your emails actually reaching inboxes? In 2026, inbox providers have become more selective than ever, and even small changes in your email bounce rate can affect your overall deliverability. Many businesses still struggle to understand what an acceptable email bounce rate looks like … Read more