The people @plesk builded a nice extension for converting htaccess content to nginx directives. Keep in mind : for plesk 11.5 and up !
Use the following plesk extension : “https://ext.plesk.com/packages/b33b9ba7-72c7-43a5-8454-f58236340563-htaccess-to-nginx”
Identifying the php scripts that are sending mail is the first step to protecting yourself against would-be spammers. Follow these steps to find the domains on which these scripts are running using Postfix: