> ## Documentation Index > Fetch the complete documentation index at: https://docs.twenty.com/llms.txt > Use this file to discover all available pages before exploring further. # Calendar & Email > Sync your email and calendar with Twenty. Twenty connects to your existing tools so your CRM stays up to date without manual data entry. ## Email sync Connect your **Google Workspace** or **Microsoft 365** mailbox. Once connected: * Emails are automatically linked to the matching Company and People records * Full email threads are visible on each record's timeline * You can send emails directly from Twenty * Multiple mailboxes per user are supported You control what gets imported — filter by date range or sender to avoid pulling in irrelevant emails. ## Calendar sync Calendar events sync automatically from your connected account. Events appear on the relevant CRM records, giving you a complete picture of your interactions with each contact or company. ## Integrations Beyond email and calendar, Twenty connects to external tools through: | Method | Use case | | ------------------------- | -------------------------------------------------------------------- | | **API** | Build custom integrations with the GraphQL or REST API | | **Webhooks** | Push real-time notifications to external systems when records change | | **Zapier** | Connect to 5,000+ apps without code | | **Workflow HTTP actions** | Call any external API as part of an automated workflow | ## Custom apps Developers can build full-featured apps on top of Twenty — adding custom UI, server-side logic, and deep integrations. Apps can be published for the community or kept private. Set up email sync, calendar sync, and troubleshoot issues. Build custom integrations with the Twenty API.