Feb 2026 • 6 min read • Email • Paste formatting
AI Copy-Paste Made My Email Look Lazy: The 7 Biggest “AI Tells” in Mail and Gmail on Mac
Email is where AI usage becomes risky.
Slack forgives sloppy tone. Email doesn’t.
When AI output lands in Mail or Gmail without cleanup, it doesn’t just look “generated.” It looks low-effort. And that reflects directly on you — or worse, on your company.
This guide breaks down the most common email-specific AI tells on macOS and how to remove them before you hit send.
It’s not about hiding AI.
It’s about not looking careless.
Some of this comes down to writing. A lot of it comes down to formatting.
Short answer
Emails look “AI-written” when they contain smart punctuation,over-formatted structure, and template language.
The fastest fix is to normalize punctuation and remove hidden formatting before you paste.
If the message still feels templated, trim the filler before sending.
You don’t need better prompts. You need better cleanup.
Key idea
In email, polish is good — but “template polish” is a red flag.
Clients and coworkers can smell automation. They don’t care about the tool. They care about effort.
The most common email AI tells:
- Em dashes and smart quotes everywhere
- Overly formal openings and closings
- Perfect paragraph symmetry
- Bullet lists that feel “presentation-like”
- Generic transitions (“In conclusion”, “Furthermore”)
- Too much hedging and politeness
- Over-explaining obvious context
Let’s start with the fast fixes: formatting and paste cleanup.
Tell #1: Smart punctuation in everyday email
AI tools default to “publication typography”:
- Em dashes (—)
- Spaced em dashes ( — )
- Curly quotes (“ ”)
- Curly apostrophes (’)
In newsletters this looks fine. In normal email, it looks artificial.
Fix
- “ / ” → "
- ‘ / ’ → '
- — / — / -- → - or parentheses
Tell #2: Over-formatted structure
AI loves clear sectioning. Email usually doesn’t need it.
Red flags:
- Headings inside emails
- Multi-level bullet lists
- “Summary / Details / Next steps” layouts
Email should read like a person typing — not a report export.
Tell #3: Template language
Watch for these:
- “I hope this email finds you well”
- “Please do not hesitate to reach out”
- “At your earliest convenience”
These phrases scream “generated” because nobody actually types them in normal work email.
Fast fix
Delete the opening filler sentence. Start with the actual message.
How to clean AI email text on Mac
Option 1: Manual cleanup (fine if rare)
Use find/replace before sending:
- — → -
- “ → "
- ” → "
- ‘ → '
- ’ → '
It works. It’s also annoying.
Option 2: Normalize before you paste (best for daily email)
If you send AI-assisted email daily, automate this step.
A macOS utility like Purifai normalizes punctuation and cleans paste artifacts before the text hits Mail or Gmail:
- Smart quotes → straight quotes
- Long dashes → consistent output
- Hidden formatting removed
- Email-safe structure preserved
Email rule of thumb
If it reads like a template, it feels lazy.
Clean punctuation. Simplify structure. Send.
Email isn’t about sounding smart.
It’s about sounding like you care.
FAQ
Is using AI for email unprofessional?
No. Sending obviously generated text is. AI is normal. Low-effort output isn’t.
Will straight quotes look worse?
In email, no. Straight quotes are what people expect from keyboard typing.
Do em dashes always look bad?
No. In blog posts and marketing copy they’re fine. In casual business email they stand out.
Can Gmail or Mail fix this automatically?
No. They preserve pasted characters. Cleanup has to happen before paste.
The takeaway
AI isn’t the problem.
Careless output is.
Clean punctuation and structure before sending — your reputation depends on it.