In this blog post category, we cover factors affecting email deliverability.
Check your ESP’s dashboard right now, and it probably shows you an email deliverability rate somewhere in the high 90s. Feels good. But that number, a benchmark report’s number, and a different tool’s number don’t always come from the same formula. They can even share the exact same name. Most guides on this topic skip … Read more
Email deliverability had a good year. The global average inbox placement rate climbed through 2025, then kept climbing into the first half of 2026. If your own numbers didn’t move the same way, that gap is worth understanding rather than ignoring. None of that improvement guarantees your own program is one of the ones getting … Read more
Six different companies each compute something they call an email deliverability score, and none of them agree with each other. Each system looks at a different thing, a domain, one specific IP, a DKIM signature, on its own scale, built from its own inputs. None of these providers has ever confirmed reading any of the … Read more
Your cold email can be perfectly authenticated, properly warmed up, and sent at a textbook-safe volume. It can still land in spam if the list behind it is dirty. That’s the piece most cold email deliverability guides bury three sections deep, if they mention it at all. Infrastructure is the part you configure once and … Read more
Two senders can have the exact same 43 spam complaints this month and walk away with two different verdicts about their standing. One reads their spam complaint rate as 0.09%, comfortably under Google’s 0.1% target. The other reads the same 43 complaints as 0.10%, sitting right on the line. You could be either one and … Read more
Black Friday is the best week of the year for email revenue. It’s also the worst week of the year to get careless about who you’re sending to. Both are true at once, and most Black Friday email marketing advice only prepares you for the first one. The volume numbers alone explain why this week … Read more
Search “does Gmail have a feedback loop” and you will find dozens of guides confidently answering no. That is not quite right. Gmail runs a feedback loop, just not the kind Yahoo or Microsoft run. This is not a small detail. It is the reason so many setup guides send you looking for a Gmail … Read more
Most articles about the cost of email bounces open with a hypothetical. Say you send 100,000 emails. Say your bounce rate runs at 4%. Say your average order value is $75. The math that follows might be sound, but every input is a guess wearing a data costume. We can do better than that, because … Read more
Cross Google’s 5,000-email-a-day threshold once, even by accident, and you become a bulk sender. Permanently. Google’s own FAQ is direct about it: bulk sender status “doesn’t have an expiration date.” Cutting your sending volume back down afterward “will not affect” that classification. Most content covering Google & Yahoo bulk sender requirements skips this detail entirely, … Read more
You send a campaign. It doesn’t bounce. Your dashboard says delivered. And still, fewer people are opening it, and you have no idea why. Every guide that talks about what is email deliverability hands you the same list: authentication, sender reputation, engagement, list quality, content, infrastructure. What almost none of them tell you is that … Read more