Mailtuck is a Gmail add-on, so it’s removed the same way as any other Google Workspace
Marketplace add-on — there is no separate account or subscription to cancel first.
From Gmail
Open Gmail and click the Mailtuck icon in the right-hand side panel.
Click the three-dot menu at the top of the add-on panel.
Removing access revokes Mailtuck’s permission to read the message you have open and to call
the Notion API on your behalf. It does not delete anything already saved in your Notion workspace.