Was able to successfully create mail handlers for 2 projects but some issues aren't being created. The issue isn't consistent but get the following types of errors when I test:
Found 2 unprocessed message(s) in the imaps folder.
Cannot create issue due to invalid license: [Sorry, you can't create any issues right now, as you need to have access to a Jira application to be able to create issues. To gain application access you need to be a member of a group assigned to an application.]