Example: Assume one receives video conferencing requests from multiple companies that use the same sender, such as Zoom where every email is sent from no-eply@zoom.us. The behind the scenes sender could be anyone from Company A to Company Z. Often the "reply-to" will be filled with the company requesting the video conference.

I see 2 options to solve this problem easily without custom scripting by the ProtonMail user:

1. Add a filter for "reply-to" to the existing filter mechanism OR
2. Add a filter to search the body of an email (MUCH MORE INTENSIVE).

Thanks for considering this feature.