Master list hygiene, boost email deliverability, and optimize your outreach campaigns with actionable guides.
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
Type an email address into your signup form, and something happens before that address ever reaches your database. A request goes out, a handful of checks run against it, and a decision comes back: let it through, flag it, or reject it. That whole exchange usually takes less than a second. It’s the reason a … 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
Search for email marketing ROI and you’ll land on the same number almost everywhere: $36 to $42 back for every $1 spent. That figure gets repeated so often it starts to sound like a guarantee, the return your email programme simply hands you. It isn’t automatic. That number describes what happens when every address on … 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
Every guide to abandoned cart email opens with the same statistic: most online shoppers add something to a cart and never buy it. Then it moves straight into subject line formulas and discount timing, which is useful, and this guide covers all of it in real depth. But there’s a question almost none of them … Read more
MailCleanup has verified 3,596,809 real email addresses over the past 12 months. We’re publishing the full breakdown here, not behind a download form. That distinction is worth pausing on. We checked the two other genuine email verification statistics reports online, from SafetyMails and Bouncer. Both require your email address before you see a single number. … 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
Every guide to double opt-in vs single opt-in repeats the same two claims: single opt-in grows your list faster, and double opt-in protects it better. The first claim holds up. The second one doesn’t, at least not the way people usually argue it. Ask what double opt-in actually protects you against, and most articles point … Read more