Documentation
Practical guides for launching Letterbook, connecting support channels, and shaping the AI agent around your team.
Start with the overview
Learn the core workspace concepts before connecting data.
Route email into Letterbook
Forward support mail from your existing customer address.
Enable outbound replies
Verify the sender and DNS records used for replies.
Connect billing context
Give support the subscription and payment data it needs.
Getting Started
Set up Letterbook and invite the people who will manage support.
Inbox
Connect support channels and manage customer conversations.
Connect an email inbox
Route customer email into Letterbook so conversations appear in one queue.
Manage conversations
Use statuses, assignments, priorities, and internal notes to keep support moving.
Set up forwarding addresses
Forward support mail into Letterbook while keeping your customer-facing email address.
Enable sending from your support address
Configure the permissions and DNS records needed for Letterbook to send replies.
AI Agent
Configure replies, routing, triage, and automation behavior.
Knowledge Base
Teach Letterbook about your product, policies, and workflows.
User Portal
Publish a branded self-service portal for customers.
What is the user portal?
Learn how the Letterbook user portal gives customers a branded place to find answers and contact support.
User portal functionality
Understand the customer-facing features available in the Letterbook user portal.
Configure the user portal
Set up portal branding, support entry points, and published knowledge base content from Letterbook.
Host the user portal on a custom domain
Configure a branded subdomain for your Letterbook user portal.
Integrations
Connect channels, databases, billing systems, and app data.
Connect Gmail
Bring Google Workspace or Gmail support mail into Letterbook.
Connect Discord
Turn Discord support threads or forums into Letterbook conversations.
Connect web forms
Send contact form and support form submissions into Letterbook.
Connect mobile apps with the API
Create support conversations from iOS, Android, or in-app help flows.
Connect Stripe
Give Letterbook billing context for subscriptions, invoices, charges, and refunds.
Connect MongoDB
Let Letterbook reference customer and account data stored in MongoDB.
Connect Supabase
Query Supabase tables for customer context inside Letterbook.
Connect PostgreSQL
Use PostgreSQL data to answer account, subscription, and usage questions.
Connect Firebase
Use Firebase or Firestore data as customer context for support.
Connect Shopify
Reference Shopify orders, customers, and fulfillment status in support replies.
Connect Google Play
Use Google Play purchase and subscription context when resolving mobile app billing questions.
Connect Paddle
Prepare Paddle billing context for support workflows.
Connect PayPal
Prepare PayPal payment context for customer support.
Connect Square
Prepare Square payment and order context for support.
Custom Actions
Let the AI agent call your APIs, webhooks, and internal tools.
API
Use the Letterbook API to create and manage support conversations.