Sim Mailer
Send emails to your workspace and let Sim handle them as tasks.
Sim Mailer gives your workspace a dedicated email address. Forward or send emails to it and Sim will process them as tasks — reading the subject, body, and any attachments, then replying to the thread with the result.
This means you can interact with Sim directly from your email client without switching apps.
Getting Started
- Navigate to Settings → Inbox
- Toggle the inbox on
- Optionally choose a custom address prefix (e.g.,
acme→acme@mothership.sim.ai) - Copy your inbox address and start sending emails
If you skip the custom prefix, one is generated automatically.
Changing your address creates a new inbox. The old address stops working immediately.
What You Can Send
Write your email like you would to a colleague. The subject and body become the task prompt.
Attachments are fully supported. Images, PDFs, and documents (up to 10 MB each) are read by Sim and displayed inline in the conversation — image attachments show as previews, just like when you upload them directly in the chat.
| Good email | Why it works |
|---|---|
| "Summarize the attached PDF and list action items" | Clear task with an attachment |
| "What's in this image?" with a photo attached | Sim reads and describes the image |
| "Draft a reply to this forwarded thread" | Uses the email body as context |
Allowed Senders
Only authorized senders can create tasks. Emails from anyone else are automatically rejected.
- Workspace members are allowed by default — no setup needed
- External senders can be added manually with an optional label for easy identification
Manage your allowed senders list in Settings → Inbox → Allowed Senders.
Tracking Tasks
Every email becomes a task you can track in Settings → Inbox:
- Search by subject, sender, or body content
- Filter by status to find what you need
- Click any completed or failed task to jump to the full conversation
Task Statuses
| Status | Meaning |
|---|---|
| Received | Email accepted, queued for processing |
| Processing | Sim is actively working on it |
| Completed | Done — the result was sent as an email reply |
| Failed | Something went wrong during execution |
| Rejected | Email blocked (sender not allowed, automated sender, or rate limit exceeded) |
Conversations
Each email task creates a conversation in your workspace. You can continue the conversation from the Sim chat interface, and any follow-up emails in the same thread are linked to the same conversation.