Get Fastmail account information and session details.

List emails from your inbox or other folders. Supports filtering by folder, read status, and search.

Get detailed information about a specific email by its ID.

Compose and send (or save as draft) an email from the account's own Fastmail identity.

IMPORTANT — DEFAULT TO DRAFT: unless the context clearly implies the email should go out immediately (explicit instruction, routine automated alert, or an established-contact follow-up), save it as a draft so a human can review before it sends. Omit saveDraft to use the configured default (draft-first unless FASTMAIL_DRAFT_BY_DEFAULT=false).

Send as the account owner. Never add AI/agent signatures or self-identification; any machine-authorship marker is configured server-side via FASTMAIL_FOOTER_HTML.

List all masked email addresses (privacy-focused aliases).

Create a new masked email address for privacy protection.

Update a masked email (enable, disable, or change description).

Delete a masked email address.

Mark an email as read or unread.

Flag or unflag an email (star).

List all email folders.

Get unread email count for inbox or a specific folder.