I have the Mailbutler icon in the top system menu bar, but nothing in any of the Apple Mail menus or tool bars. I have restarted Mail, but nothing is added.
thanks for contacting us. Please try to solve your issue by activating the Apple Mail plugins. In order to find out how to activate plugins, please follow this link: https://support.mailbutler.io/knowledge-base/how-to-activate-apple-mail-plug-ins-in-macos-mojave/
If activating the plugins does not solve your issue, we kindly ask you to please send your inquiry to firstname.lastname@example.org. Thank you!