Tamozo journal
Blog
How B2B teams find the right people to talk to — what the data actually supports, and what it does not.
Email list decay: how to measure it on your own list
Four different things get called decay, and they need four different tests. Here is how to measure each on your own list, and what the published numbers actually cover.
Bounce rate as a list-quality metric
Under 2% total bounce, hard bounces under 1%. Here's where that number comes from, what it doesn't measure, and what happens once you cross it.
How B2B data vendors define "accurate," and why none of them measure it the same way
Apollo, UpLead, RocketReach, and Cognism all publish accuracy numbers near 95-98%. None measure the same thing, and no independent party has tested them against each other.
Catch-all email: what it means, and what to do with those addresses on your list
A catch-all domain accepts every address, so your verifier cannot tell you which exist. What the label means at five vendors, and what to do with those records.