Implement OAuth for authentication when available

Add support for multiple (JMAP) email accounts

Add support for custom JMAP servers

macOS Shortcuts integration

Search scopes

Report as spam

Apply a label by dragging from the sidebar

Local label colors

Add an option to always show images

Notification enhancements

User customizable keyboard shortcuts

Extend keyboard shortcuts

Widgets

Adopt the new API token authentication scheme implemented by Fastmail

Deleting a folder on Fastmail.com causes Swift Mail to crash on next launch

Reference app-specific password requirements in login window

Collapse a message body by clicking in empty header space

Comprehensive landing page

Local mailbox management

Swift Mail Guide

Attachment list icons may render before message body content

Message content may render with a serif font (Times New Roman) instead of Helvetica

Plain text message content may briefly overlap header when loading

Add font size setting for Message List and Message Body content

Attachment icons may overlap signature at end of message

Launching with restored state can cause crash after an unexpected shutdown

Body content for *plain text* messages may layout improperly

Attachment downloads may fail when attempting to save to disk

Previewing a message with Quicklook occasionally fails

New message notifications and dock badges

Multiple editor windows

Recipient suggestions in the editor

Block images & remote content by default

Dark mode

Message filtering

Search suggestions

Mailbox organization: folder & label modes