Is it possible to allow people to add comments by email BUT prevent new issue creation?

[Rob Horan]

The documentation seems to suggest this is NOT possible:

This message handler creates a new issue, or adds a comment to an existing issue. If the subject contains an issue key, the message is added as a comment to that issue. If no issue key is found, a new issue is created in the default project.

[Nic Brough -Adaptavist- · Accepted solution]

https://confluence.atlassian.com/jira/creating-issues-and-comments-from-email-185729464.html#CreatingIssuesandCommentsfromEmail-Addacommentfromthenonquotedemailbody mentions three handlers that only comment, without create.