Routing rules don't necessarily send notifications, but depending on the settings in the routing rule, if the user has certain notifications turned on, they will get those notifications.
The routing rule can do any or all of these three things:
- assign the request to a particular user
- assign the request to a team
- place the request in a particular project (the one used to submit the request or a completely different project)
Any notifications resulting from any of those options are based on the notifications that each individual user has turned on
- assigned to a user - notification: I'm assigned to an issue
- assigned to a team - notification: My team gets a new work request
- request placed in a project - notification: An issue is added to a project I'm on OR An issue is added to project I own (if the user is the project owner) OR An issue is added to a project I sponsor (if the user is the project sponsor)
@jaxelle based on your post and other comments, it does sound like these people probably have the email notification on for 'an issue is added to a project I'm on' and they can turn them off.