We need to find a way to differentiate the issues which got created through emails from the manually created ones

We need to find a way to differentiate the issues which got created through emails from the manually created ones through JQL

This will be helpful for users who would like to find out which issues are getting created through emails.

We already have this option in JSM where through "request-channel-type = email" the issues can be filtered but this is not available for Jira Software Data Center yet.