* fix(server): escape template variables in custom email templates * fix(server): strip preview tags until stable (cherry picked from commit 616839e8d43a9de21d0c9391847fba97ac41a759)
* fix(server): escape template variables in custom email templates * fix(server): strip preview tags until stable (cherry picked from commit 616839e8d43a9de21d0c9391847fba97ac41a759)