See also:
How Email Parser works
Email Parser connects the different email processing steps with arrows. When an email is received, it will follow the arrows starting from the source of the email at the top and all the way to the bottom of the left panel list, where the last action is usually placed. It will run any filter, parser, or action found in the path. Bifurcations and loops can be used to conditionally run certain items or run an action multiple times if needed.
An arrow also shows the connection between two fields. In the image below, the arrow that goes from the field “Subject” to “order_id” means that “order_id” is captured from the text contained in “Subject”.Arrows can be changed directly on the left panel, moving their ends with the mouse, or going to the item properties at the right.