Configuration

Configuration is stored in ~/.config/matcha/config.json.

Example Configuration

Passwords have been removed since v0.19.0

{
  "accounts": [
    {
      "id": "unique-id-1",
      "name": "John Doe",
      "email": "john@gmail.com",
      "service_provider": "gmail",
      "fetch_email": "john@gmail.com",
      "send_as_email": "john@alias.example",
      "smime_cert": "/home/jane/.certs/jane_smime_cert.pem",
      "smime_key": "/home/jane/.certs/jane_smime_private.pem"
    },
    {
      "id": "unique-id-2",
      "name": "Work Email",
      "email": "john@company.com",
      "service_provider": "custom",
      "fetch_email": "john@company.com",
      "imap_server": "imap.company.com",
      "imap_port": 993,
      "smtp_server": "smtp.company.com",
      "smtp_port": 587
    }
  ],
  "mailing_lists": [
    {
      "name": "Team",
      "addresses": ["alice@example.com", "bob@example.com"]
    }
  ],
  "theme": "Matcha",
  "enable_split_pane": true,
  "disable_images": true,
  "hide_tips": true,
  "body_cache_threshold_mb": 100
}

send_as_email is optional. When set, Matcha uses it for the outgoing From header while continuing to authenticate with the account's login address.

enable_split_pane enables a side-by-side view where the email list and the selected email are shown on the same screen.

body_cache_threshold_mb sets the maximum size (in megabytes) for the local email body cache. When this limit is reached, least recently accessed cached emails are evicted across all folders to make room for new ones. Defaults to 100 MB if not specified.

Data Locations

Configuration and persistent data are stored in ~/.config/matcha/:

File	Description
config.json	Account settings, preferences
keybinds.json	Custom keyboard shortcuts (see Keybinds)
signatures/	Email signatures
pgp/	PGP keys
plugins/	Installed Lua plugins
themes/	Custom theme JSON files
secure.meta	Encryption metadata (only when encryption is enabled)

Cache data is stored in ~/.cache/matcha/:

File	Description
email_cache.json	Email metadata cache
contacts.json	Contact autocomplete data
drafts.json	Saved email drafts
folder_cache.json	Folder listings per account
folder_emails/	Per-folder email list cache
email_bodies/	Cached email body content

Cache files are automatically refreshed from the server on each app launch and manual refresh. If an email is removed from the server, its cache entry is cleaned up on the next refresh.

Encryption

All data files can optionally be encrypted with a password. See Encryption for details.

When encryption is enabled, account passwords are stored inside the encrypted config.json instead of the OS keyring.