Cold Email Tracking That Tells the Truth: Opens, Clicks, Replies and the Bots In Between
Half of raw 'opens' are security scanners, not people. Here is how open and click tracking actually works, why Leadistry counts replies and clicks but never opens, and which numbers deserve your attention.
Every cold email tool shows you an open rate. Very few tell you that a growing share of those "opens" happen before a human ever sees the message, fired by corporate security scanners, link-checkers and inbox pre-fetchers that fetch every pixel and probe every link at delivery time.
If you make decisions on raw numbers, you will A/B test noise and celebrate ghosts. Here is how the tracking actually works, why Leadistry counts clicks but never opens, and the one number that is left when you take the bots away.
How opens are tracked
An invisible one-pixel image is embedded in each message, hosted on a tracking domain with a per-send identifier. When a mail client loads images, the pixel is fetched and an open is logged for that exact send.
Two well-known caveats. First, image-blocking clients produce no open at all, so opens systematically undercount. Second, and increasingly dominant, automated systems fetch the pixel without a human present: Microsoft Safe Links, Mimecast, Proofpoint and friends scan messages on arrival, and both Gmail and Outlook proxy image loads in ways that can fire early.
What that means in practice: a tool can filter out the scanners it recognises, but it cannot filter the ones it does not, and it cannot count the readers whose mail client blocks images. An open rate is an estimate with errors in both directions.
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How clicks are tracked
Links in your message are wrapped through a tracking domain: click, log, redirect, in a few milliseconds. The same scanners that fetch pixels also probe links on arrival, so a share of logged clicks are not people either.
A genuine click is rarer than an open and correspondingly more meaningful: it is a person choosing to look at your thing. The price is that every link in your email is rewritten to pass through the counter first, though it still lands on the page it names.
What Leadistry does
There is no tracking pixel on anything your agent sends, so nothing records an open. A pixel only proves that something loaded a picture, and the ICO's guidance is that a tracking pixel needs the reader's consent, which a first email cannot have.
Clicks are counted. Each link passes through our click counter on its way to the page you linked, the email says so at the bottom, and clicks from the link scanners we recognise are left out. The unsubscribe link and the link to remove someone's details are never counted. Otherwise the email goes out from your own Google or Microsoft mailbox exactly as you approved it.
It means the numbers are smaller than the ones outreach tools usually show you, and it means they describe something that actually happened.
Replies, the metric that pays invoices
A reply is the one signal no scanner fakes. Leadistry reads the replies to the emails it sent from your connected mailbox, and nothing else in your inbox, and matches each one to the company it came from. A reply stops everything to that company, so nobody who answered gets a follow-up. Replies wait on the Desk with the ones that need you first, and opening one drafts an answer for you to read. You send it; it never sends itself.
Bounces are taken just as seriously in the other direction: a bounce cancels whatever is still queued for that address, and if the first email to a lead bounces, the lead is credited back. What a bounced cold email costs you explains why that matters.
Which numbers to actually watch
In rough order of usefulness:
- Replies per version of your email. The metric closest to revenue. Read it as a count out of emails sent, such as 6 replies from 140 emails, rather than a percentage on its own. When you test two versions side by side, replies are what they are judged on.
- Bounces per mailbox. Delivered is simply sent minus bounced, no creative accounting. Bounces are the early-warning system for reputation problems. Pair with the warm-up guide if they drift.
- Wins. On the Desk you mark a reply as a win: a meeting, a quote or a yes. That count, by type, is the number that matters at the end of the quarter.
- Clicks. A click is a person choosing to look, so it is worth knowing, but a scanner we do not recognise can still add one: read clicks as a sign of interest rather than an exact count.
- Opens, if another tool shows them to you, are best treated as a rough comparator between two subject lines rather than an absolute truth. Leadistry does not record them.
The Results on the Desk show replies by reason over the last 90 days as counts, such as 2 replies from 9 emails. Two out of nine is a fact; twenty-two per cent on its own is not.
The compliance thread
Measurement shares plumbing with compliance: every message carries a one-click unsubscribe (honoured, and permanent), suppression lists are checked before anything sends, and the whole approach sits under the UK GDPR and PECR analysis in our compliance guide.
Honest numbers, clean lists, and follow-ups that stop the moment a human answers. That is measurement working for you rather than performing for you. See it on your own emails.