Read the signal, not the noise
Practical, fact-checked writing on email tracking, follow-ups, and deliverability, from the team building the tracker.
How a read email ends up marked unopened
When someone replies to an email your tracker still calls unopened, the reply is right and the tracker is not. Here is why it happens, how often it happens on your own list, and what to do with every unopened email as a result.
Read the article →What a winning proposal looks like before it is signed
Proposify's data on 742,137 proposals shows buyers viewed 93 percent of the proposals they signed and 80 percent of the ones they rejected. The signals that separate the two are repeat views, reading time and extra readers. Here is how to see them when you send a proposal from Gmail.
PrivacyAn email open carries a time and no place
For Gmail recipients, a tracking pixel is loaded by Google's image proxy, so any location a tracker reports belongs to Google. Clicks can reveal a network, and MaxMind's published accuracy puts only 60 percent of US addresses within 50 kilometres. Here is what each signal can tell you about where a reader is.
RecruitingMost candidate replies come after the first email
In Gem's data from nearly 8 million recruiting sequences, a first email drew more than seven opens for every reply, and about 61 percent of eventual replies came on a follow-up. Pin's 2026 data agrees. Here is how to read an opened, unanswered email from a candidate and when to write again.
AnalyticsA good cold email reply rate depends on what you divide by
Belkins reports a 0.45 percent average cold email reply rate and Instantly reports 3.43 percent, and each divides a different count by a different total. One worked campaign shows how the same results read anywhere from 1.3 to 12.5 percent, and how to measure yours so the comparison is fair.
DeliverabilityWho actually needs a second domain for cold email?
A separate domain contains the damage from high volume cold sequences. Google counts a subdomain with its parent, a new domain starts with no history, and at low volume you cannot even see its reputation, so most one to one senders are better off on their real address.
OutreachCold email length matters less than what you ask for
The 50 to 125 word rule comes from a 2016 study of mostly warm email. Cold email data from Hunter and Reply.io shows word count shifts reply rates by well under one point, while a single paragraph email does noticeably worse than two or three short ones.
Follow-upsTracking is decided the moment you press Send
No tracker can add tracking to an email after it has been sent, because the tracking has to be inside the message when it leaves. What you can do is send a tracked reply in the same thread, and make sure the next email goes out tracked.
SetupEach inbox you send from needs its own sign-in
Yes, one tracker can cover several Gmail accounts, but each account has to be connected on its own, and Google is retiring Send as for non-Google addresses in January 2027. Here is how to set it up so nothing goes out untracked by accident.
FundamentalsGmail's real window for taking an email back
Gmail can pull back a message for at most 30 seconds, and whether the recipient has opened it makes no difference after that. Here is what still works later, and what to set up before the next mistake.
OutreachOne hundred sends to find the Gmail template that works
Gmail templates have no reporting, so finding your best one means tracking each send. A worked example shows why twenty sends per template tells you almost nothing and roughly a hundred starts to.
ProductivityGmail has a mail merge you may already pay for
Gmail has a built-in mail merge on several paid Google Workspace plans. Google's own help page shows what it handles well, what it adds to every email, and the gaps that still send salespeople to an extension.
MobileYour phone sends untracked email unless you ask
An email sent from the Gmail app on your phone goes out with no tracking unless something added it before you tapped send. Google's own developer guide explains why, and the vendors' help pages show what each workaround costs.
MeasurementWhy read time stops at the Gmail inbox
Read time is a real metric, but it only exists when the reader's email app keeps reporting back while the message is open. Gmail does not. Here is how the measurement works, where it fails, and what to measure instead when you need to know a proposal was read.
DealsCall now or wait: the first hour after an email open
The well known speed to lead research measured replies to inbound inquiries, not email opens. Here is how to match the speed of a follow-up to what the prospect actually did, and what to do with the hour after an open instead of calling.
ComplianceA polite way out, written into every cold email
Gmail only requires one click unsubscribe headers from bulk senders, but the CAN-SPAM Act covers every commercial email, one to one included. A reply based opt-out can satisfy it, as long as every no thanks is honoured across every list and sequence you run.
ComparisonsWhere Gmail trackers differ once the pixel loads
Mailtrack and Streak both count an open with the same tracking pixel. The real differences are in how they handle your own rereads, group emails, forwards and automatic image loads, and you can test all of it in ten minutes before you choose.
AnalyticsWhen a click arrives before the reader does
Click tracking is more reliable than open tracking, but scanners from Microsoft, Gmail and corporate gateways now click a rising share of links before a person does. Here is the data, and a four question check for reading one click on one email.
FundamentalsProof of delivery, as far as Gmail will give it
Gmail has no delivery receipt. A message in Sent means Gmail accepted it, a failure comes back as a bounce from Mail Delivery Subsystem, and success arrives as silence. Here is how to read each outcome and what a tracker adds.
OutreachWhat 120,000 randomized recipients say about a first name
Randomized experiments on more than 120,000 people put the personalization effect at about a quarter better odds of a response. The same experiments show why it works: a name persuades nobody, it gets the sentence next to it read.
WritingThe words the inbox adds to your subject line
The character counts in most subject line guides measure one app at one window width. What decides your first impression is a row the mail client assembles from your sender name, your subject, and whatever text it finds at the top of your message.
Follow-upsThe fifth follow-up has to earn its place
Published answers to how many follow-ups to send run from two to nine, out of datasets built the same way. Here is why they disagree, and how to work out your own stopping point from your own threads.
AnalyticsTelling five readers apart on one email
A single tracking pixel in a group email reports one open, not five. Here is what the mail standards actually allow, what per-recipient copies usually cost you, and how to keep the To line intact while still learning who read it.
SecurityBefore you click Allow on an email tracker
A Gmail tracker can ask for three different permissions, and the Gmail one matters most. How to read Google's scope wording, what the unverified app screen and the annual security assessment mean, and a two minute check for any tracker.
ComplianceDo you need consent to see who opened your email?
In April 2026 France's CNIL set out when an email tracking pixel needs consent, and in July it answered the questions salespeople actually ask. Here is what it says about prospects, B2B mail and senders outside Europe, and how to keep tracking where it is allowed.
DeliverabilityThe spam filter's view of a tracked email
A tracker adds an invisible image and a rewritten link to your message, and only one of them is what filters actually name. Here is what each one costs, with the rules and rejection strings quoted.
ProductivityWhich Gmail sending limit runs out first
The usual answer to how many emails you can send in a day is 500 from a personal account and 2,000 from Google Workspace. That is one row of a longer table. Here is the arithmetic for a real outreach day, worked from Google's own documentation.
PrivacyEmail tracking, from the recipient's chair
Most guides answer this with a confident no. Sit on the other side of the message and the honest answer is that several mainstream inboxes already flag tracking, sometimes by name. Here is where it shows, and how to send in a way you could explain out loud.
OutreachA better clock for cold email send times
Send time advice is built on open timestamps, and for most tracked opens that timestamp records delivery rather than reading. Here is where the numbers come from, and how to pick a send time from signals that still need a person.
AttachmentsThe file you send, and the file you share
Sending the same document two different ways leaves you with two completely different amounts of information afterwards. Here is what each route reports, where the numbers come from, and who gets to switch them off.
DealsMove the thread to a calendar invite
A calendar reply is one of the few signals in email that a person sends on purpose, and the standards behind it define exactly what each answer means. Here is how to read one, and where it quietly goes missing.
Follow-upsWhat a quiet thread still tells you
An unanswered thread has several possible explanations, and the standards behind threading, out of office replies and read receipts let you tell them apart. Here is what silence does and does not tell you.
AuthenticationThe new DMARC standard, in plain terms for senders
DMARC moved onto the IETF standards track in May 2026, with a new way of finding your policy and a shorter list of tags. Here is what changed, and what a sender should publish.
DeliverabilityHow to earn a place in the Primary inbox
Apple Mail and Gmail sort your message into a category before a human sees it. Here is what each one actually documents, and how to earn the recipient override that sticks.
FundamentalsThe honest state of email open tracking in 2026
Most recorded opens in 2026 are machines, not readers. Here is what an open still tells you, and the signals worth trusting instead.
What we cover
Five threads we come back to, each grounded in how email actually works today.
What email signals really mean, and how to read them without fooling yourself.
Landing in the inbox: authentication, reputation, and the sender rules that keep you there.
Timing and reminders that turn a quiet thread into a reply.
Personalization and mail merge that reads as written, not blasted.
How privacy changes in the inbox reshape tracking, and what to do about it.