Available For Mail App App Page

To add a component to a Mail App Lightning page in the Lightning App Builder, or email application panes in Lightning for Outlook or Lightning for Gmail, implement the clients:availableForMailAppAppPage marker interface. This interface is used with clients:hasItemContext and clients:hasEventContextto implement record-specific and event-specific information.

To ensure that custom components appear correctly in Lightning for Outlook or Lightning for Gmail, enable them to adjust to variable widths.

For more information, see the Lightning Aura Components Developer Guide.