AI-written emails save real time once you stop using them like a glorified template. The trick is being specific in your prompt so the output sounds like you, not like every other AI-written email.
Here are the tools that work, prompts that actually help, and warning signs that someone sent you AI slop.
Best tools for AI emails
- ChatGPT (free or Plus) – most flexible
- Claude – usually writes more natural-sounding emails
- Gemini in Gmail – drafts directly in your inbox
- Copilot in Outlook – similar integration for Outlook users
- Lavender – dedicated sales email writer with scoring
For most personal use, ChatGPT or Claude. For sales-specific, Lavender. For Gmail or Outlook users who want it built in, Gemini or Copilot.
Write a useful AI email prompt
Bad prompt – "write an email asking for a meeting". You get a generic, robotic email.
Good prompt – "Write a friendly but professional email to John, asking if he's free Thursday at 2pm to discuss the Q1 budget. Reference our conversation last week where he mentioned wanting to review numbers. Keep it under 5 sentences. Sign as Mark."
The second one gets you something you can actually send with minor tweaks. The specificity makes the difference.
Prompt templates that work
Keep these handy. Adjust the details:
"Write a follow-up email after a 2 PM meeting with [name] from [company]. We discussed [topic]. Action items were [X] for me and [Y] for them. Send by Friday. Casual but professional tone. Under 100 words."
"Decline a meeting request politely. The reason is I'm overcommitted this week. Suggest pushing to next Tuesday afternoon. Don't apologize excessively. 3 sentences max."
"Reply to my boss saying I'm sick today and won't be in. Don't overshare details. Mention I'll be available by email for emergencies. Keep it brief."
Tell the AI to match your style
Paste 2-3 of your own past emails into ChatGPT or Claude. Add this prompt:
"Here are examples of how I write emails. Match this tone, vocabulary, and rhythm in any email I ask you to draft."
For the rest of the conversation, AI tries to write like you. Way better than the default corporate voice.
Use Gemini directly in Gmail
If you're on a Google Workspace plan with Gemini access, the Help me write feature lives right in Gmail's compose window.
Open compose. Click the pen and stars icon at the bottom. Type a quick prompt. Gemini drafts the email. Edit and send.
No switching between apps. Saves real time on routine email tasks.
Use Copilot in Outlook
Microsoft Copilot integrates with Outlook similarly. Click the Copilot icon in the ribbon while composing. Pick "Draft with Copilot".
Type your prompt. Copilot drafts the email. You can also ask Copilot to summarize a long email thread before replying so you know what's actually being asked.
When NOT to use AI for emails
AI emails feel obvious and impersonal in certain situations:
- Apologies – sound hollow when AI-generated
- Condolence messages – never delegate sympathy
- Personal compliments or gratitude to specific people
- Emails to your romantic partner or close friends
- Anything where the recipient cares that YOU wrote it
For these, just write them yourself even if it takes longer. The recipient can usually tell.
Warning signs of AI email slop
How to spot AI-written emails (so yours doesn't sound like that):
- Starts with "I hope this email finds you well"
- Uses em dashes everywhere (real people don't)
- Three perfectly balanced bullet points
- Words like "leverage", "synergy", "robust", "cutting-edge"
- Ends with "Please don't hesitate to reach out"
Edit these out of every AI draft before sending. Replace with natural phrasing. The email becomes way more authentic.
Always edit before sending
Never paste AI output directly into an email and send. Always read once and edit. Common edits I make:
- Cut formal openings and closings
- Replace generic phrases with specific ones
- Add one personal detail (something only I'd know about the recipient)
- Trim by 30% – AI tends to over-explain
Total time saved is still significant compared to writing from scratch. Just the polishing instead of the creation.
What kind of emails do you write most? Tell me and I'll suggest a tighter prompt template for that type.