Hi,
You can try below (untested) a business rule that runs before insert/update on sys_email table.
When to Run: Required conditions or recipient list to make it specific. Else it will run for all mail that are received.
Suppose, Subject contains ABC
Script:
(function executeRule(current, previous /*null when async*/ ) {
var getwatermark = new GlideRecord('sys_email');
getwatermark.query();
if (getwatermark.next()) {
var bodyhastext = getwatermark.body;
bodyhastext = bodyhastext.replace(/MSG0042550/g, '');//Suppose my watermark is of form : //Ref:MSG0042550 so it replaces it with empty
getwatermark.body = bodyhastext;
getwatermark.update();
}
//Ref:MSG0042550
})(current, previous);
You can use your own logic as per your watermark text. In case you can also use split or substring methods for removing watermark,
Note: This has high impact on the performance of system
