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Everything about email opens.
73 guides on knowing whether your emails get read, in Gmail and in Zoho Mail.
Comparison 
Deliverability How to Tell If Your Email Went to Spam
Nobody replied. Ignored, or filed in a folder nobody reads? You cannot see the answer directly, but you can eliminate it, and a five minute check does most of the work.
How it works How Accurate Is Email Open Tracking, Really?
Every tracker shows a number. Almost none says how wrong it can be. We build one and we have measured it, including the mistake we made and had to undo.
Product Mailcheck Now Tracks Clicks (Beta)
An open says the message was looked at. A click says what the reader went looking for. Click tracking is now in beta: opt-in, off by default, and honest about where it bends.
Privacy What Mailcheck Stores, and What It Never Sees
You are about to give a browser extension access to your inbox. Here is the complete list of what mailcheck keeps, what it never touches, and how to verify the same about any other tracker in four minutes.
Follow-up Five Things to Write Instead of "Just Checking In"
Nobody enjoys writing it, and nobody enjoys receiving it. The sentence is a symptom of writing without information. Five replacements that are not clever tricks, and the rule behind them.
Use cases Did They Open Your Job Application?
Eleven days, no answer. Read and passed over, forwarded, or never opened at all are three different situations that look identical from your side. Tracking separates them.
How it works What Happens When Someone Forwards a Tracked Email
Your contact forwards your proposal to their boss. The tracking keeps working, and the pattern it produces is the closest email gets to hearing a conversation in the next room.
Comparison