I would like to create custom email notifications for certain activities my users could take in Trello, including assigning a card, changing a label or custom field, or commenting and tagging someone.
Butler appears to limit the recipients of custom email notifications to 1) specific email address, 2) All members of a card, 3 All members of a board.
Is there any way to instead dynamically insert the email address dynamically according to the matched user name or triggering user name?
Butler variables - Trello Help