Fastmail

Connect your Fastmail account to sync email, calendar, and contacts with Meridian

Meridian connects to Fastmail to sync your email, calendar, and contacts using standard open protocols. Fastmail is a fully-featured integration covering all three data types.

What Syncs

  • Email – Full inbox, folders, and conversations (via IMAP/SMTP)
  • Calendar – Events across all of your Fastmail calendars (via CalDAV)
  • Contacts – Your full contact list (via CardDAV)

Setup

Connecting Fastmail requires an app-specific password. Fastmail does not allow third-party apps to use your main account password directly.

Generate an App Password

  1. Log into Fastmail.
  2. Go to Settings > Privacy & Security > App Passwords.
  3. Click New App Password.
  4. Give the password a label (e.g., “Meridian”) and select the appropriate access level.
  5. Copy the generated password.

Connect in Meridian

  1. In Meridian, go to Settings > Connections.
  2. Click Add Connection and select Fastmail.
  3. Enter your Fastmail email address and the app password you just generated.
  4. Click Connect.

Your email, calendars, and contacts will begin syncing immediately.

How It Works

Meridian uses standard, open protocols to communicate with Fastmail’s servers:

  • IMAP for receiving and syncing email
  • SMTP for sending email
  • CalDAV for calendar synchronization
  • CardDAV for contact synchronization

These are the same protocols that any standard email or calendar client uses, ensuring broad compatibility and reliable operation.

Sync Behavior

  • Email – Synced via IMAP with TLS encryption. Meridian maintains a local cache of your mailbox state and fetches only new or changed messages on each sync cycle.
  • Calendar and Contacts – Synced via CalDAV and CardDAV with efficient incremental updates. Only changed items are transferred after the initial sync.

All connections to Fastmail’s servers are encrypted in transit.

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