Let Claude draft your email replies, without send access

Claude reads the thread and writes a reply that lands in your Drafts folder. Nothing leaves your mailbox until you send it yourself.

Get MoltenMail on the Mac App Store Download MoltenRock · Free

The short answer

To let Claude write email replies safely, give it a connection that can read and save drafts but cannot send. MoltenMail provides that on a Mac for Claude Desktop and Claude Code: Claude lists folders, reads messages and saves drafts to your Drafts folder. MoltenMail blocks sending, deleting, moving and marking, even if Claude asks, and your password stays in the macOS Keychain.

The problem

The inbox is where AI help is most useful, and most risky

Hours of replies
Most replies are routine. Writing them still takes the day.
Send is irreversible
An email sent in your name can’t be unsent.
Passwords and app tokens
Connecting an assistant usually means handing over credentials.

How MoltenRock handles it

Claude writes. You send.

Drafts in your mail app
Replies appear in your Drafts folder, ready to edit and send.
No send path
MoltenMail blocks sending, deleting, moving and marking.
Credentials kept
Your password stays in the macOS Keychain, inside MoltenMail.

How it works

Set it up

01
Install MoltenMail
Add your mailbox.
02
Connect Claude
One-click setup for Claude Desktop; Claude Code uses the Connect an agent flow.
03
Ask for drafts
Review them in Mail and send the ones you like.

Straight answer

Where your email goes

Stays on your Mac

Your password
The send button
Attachments and remote images, by default

Leaves your Mac

The messages Claude reads, to Anthropic’s model, as with any Claude conversation
Drafts, saved to your mail server
Want nothing to leave? Use a local model with MoltenMail instead

Questions

What people ask first

Can Claude send an email by mistake?

No. MoltenMail has no send path for the agent.

Does it work with Claude Code?

Yes, through MoltenMail’s Connect an agent flow for coding agents.

Why is one-click setup greyed out in the App Store version?

Apple’s sandbox rules stop the App Store version from installing the helper for you. Use Set it up manually in the app; the connection is the same.

What does it cost?

MoltenMail is free; MoltenMail Pro ($9.99, one time) adds unlimited server drafts.