Cold emails sound like AI for nine specific reasons, and a reader clocks most of them in about two seconds. The good news is that every one of them is fixable. Below is each tell with a before-and-after rewrite, so you can run your own drafts through the list and catch what is quietly sending you to the trash.
This matters more than it used to. Inboxes are now full of grammatically perfect, completely forgettable machine writing, and buyers have trained themselves to delete it on sight. The bar is no longer "is this well written." It is "did a real person who knows something about me write this."
1. The throat-clearing opener
"I hope this email finds you well." "My name is, and I work at." A reader has seen these ten thousand times, and every one of them came from someone selling something. The opener is the most valuable real estate in the email, and a generic greeting wastes it.
2. Flawless grammar with no pulse
Machine writing is almost always technically perfect, and that is part of the problem. Real people drop a word, start a sentence with "and," use a fragment for emphasis. Writing that has zero texture reads as zero human. You do not need errors — you need rhythm.
3. The compliment that fits anyone
"I love what you are doing at your company" tells the reader you know nothing about their company. A compliment only lands when it could not be pasted into a thousand other emails. If you cannot name the specific thing, do not fake the praise.
4. Dashes everywhere
Heavy use of the long dash is one of the loudest machine tells right now. People notice it even when they cannot name it. Swap most of them for a period or a comma and the writing instantly reads more like speech. Read your draft out loud and you will hear where the dashes are doing work a full stop should do.
5. The tidy list of three
Models love grouping everything into neat triples. "Faster, smarter, and more efficient." Once you see the pattern you cannot unsee it, and neither can your reader. Vary your structure. Use two items, or four, or one strong claim instead of three weak ones.
6. Buzzwords doing the heavy lifting
Leverage, synergy, robust, seamless, cutting-edge, game-changer. These words signal that the writer had nothing concrete to say and reached for filler. Replace every buzzword with the plain thing it is hiding.
7. The ask with no reason
"Do you have 15 minutes to chat next week?" Why? A reader gives time when there is a specific reason to. Tie the ask to the thing you opened with and give them a reason that is about them, not your quota.
8. Length that ignores the reader
Long cold emails get skimmed and abandoned. The ones that get read tend to sit under a hundred words, because the reader can take them in at a glance. If your draft has a paragraph the recipient has to work through, cut it.
9. The same email sent to everyone
This is the root tell that produces all the others. When one message has to fit a whole list, it gets sanded down to something so generic it fits no one. The fix is not a better template. It is a different email for each person, built on something true about them.
The pattern underneath all nine
Look back over the list and the common thread is obvious. Every fix replaces something generic with something specific, and something stiff with something spoken. That is the entire game. The reason most AI outreach fails is not that a machine wrote it. It is that the machine had nothing real to say and no voice to say it in.
Frequently asked questions
Further reading on email voice and tone: Lavender. The tells described here reflect patterns widely discussed among cold-email practitioners in 2025 and 2026.