Confidence scoring on every email open

There's no single accuracy figure, and we'd rather say so than invent one. What runs is a weekly check of every rule: how often a reply, a click or a user confirmed it against how often a user overrode it, over a rolling 30 days. A rule with too little feedback reports nothing rather than a guess. Note what that can't tell you: it measures the rules against corrections people actually make, so a user who never reports a misgrade is invisible to it.

Each grade carries a fixed score: verified 100, most-likely human 70, possibly human 20, and 0 for machines and your own opens. Anything at 25 or above counts, so verified and most-likely human opens are counted and the rest aren't. The floor isn't a setting. It's the same for everyone.

Some do, behind the scenes. Yesware says it filters proxy and security-scanner opens, and HubSpot says it excludes bot activity. Others say they can't tell machines from people, including Boomerang. What's less common is showing the grade and the reason for every single open, which is what Outsolvi does.

Yes. The grading runs on the open itself, whichever app sent the email and whichever app the recipient reads it in. Apple Mail Privacy Protection depends on the recipient's mail app, and security scanners are most common on company mail such as Microsoft 365.

Yes, most of all on Apple-heavy or scanner-heavy B2B lists. The drop is noise leaving the data, not real engagement disappearing. Reply rate is the cleaner side-by-side signal during a switch: if reply rate held while open rate dropped, the previous tool was counting machines.

Yes. Every open on a tracked email shows its grade and reason. Choose Diagnose on an open to see the rule that fired and what Outsolvi saw: the time after send, the network, the browser signature, and how often that rule has been right lately.