String to prevent processing emails past a certain point

Is there a string or keyword set we can introduce into our ticket-to-email templates that will cause CommitCRM to prevent processing past a point on an email? The goal is to keep individual email updates from showing up as several pages within a CommitCRM ticket.

RangerMSP already tries to 'cut' the email content to only include the 'new' text, the one above the previous message. In some cases, the sender uses different formats that are less common and/or the system cannot recognize automatically and therefore it is including more text. This is customizable - however - it is very advanced and required understand Regular Expressions. To configure additional REGEX rules use the Settings > Email Connector > Reply Identification Rules (REGEX) option from the menu.

Hope this helps.

Thank you!