"Will Gmail know my email was written by AI?" is a common worry. Here is the honest picture.
What Gmail actually does
Gmail's filtering is built around spam and safety, not authorship. It looks at signals like sender reputation, authentication, links, attachments, how many people mark similar messages as spam, and engagement patterns. It is not running an AI-detector on your prose to decide whether a human wrote it.
So there is no "AI-written" flag that Gmail stamps on your email. A thoughtful, well-targeted email written with AI assistance is not penalized for that reason alone.
Why your email might still be a problem
The real risks are indirect:
- It reads as generic. If your email looks like a template sent to a thousand people, recipients ignore it, and low engagement plus spam reports can hurt your sending reputation over time.
- It carries junk characters. Text pasted from a chatbot can include invisible characters and non-breaking spaces. These can render as odd boxes for the recipient and, in bulk sending tools, occasionally correlate with deliverability issues.
Neither is "Gmail detecting AI." Both are about quality and cleanliness.
How to make AI-assisted email land
- Write for the person. Open with a specific detail, keep it short, and make one clear ask. Generic beats nothing, but specific beats generic.
- Remove the AI tells. Cut em dashes, vary sentence length, and drop the summarizing final line so it reads like you.
- Clean the text. Run your draft through a cleaner to strip invisible characters and normalize spacing before it goes into your email tool. textscrubr does this in your browser, so what you send is exactly what you see.
The takeaway
Gmail is not judging whether AI wrote your email. Recipients might, and deliverability depends on quality and behavior. Write specifically, clean the text, and the AI question stops mattering.