Sending identities

Default Sending Addresses

The compose editor populates the From field with the default account address (the address you use to sign into Fastmail, for example) when composing a new message in Swift Mail.

Account Default

Fastmail allows changing the account default to an alias via their web app. Unfortunately, this setting is not exposed to third-party clients via the JMAP protocol at this time.

However, adding a local preference to Swift Mail is planned. Visit the Roadmap to be notified when support is added.

Mailbox Default

Swift Mail supports per-mailbox default sending addresses when composing new messages.

• The From field of the compose editor will automatically display the default address of the currently selected mailbox (if set) in the sidebar.

• To configure default addresses for specific mailboxes, head to the Get Organized section under the Fastmail settings sidebar and look for the appropriate Label or Folder settings entry. Select a mailbox to edit, and set the Default address field under Show advanced preferences.

Note: The message's receiving address is used when replying to or forwarding an email addressed to an alias.