JIRA doesn't have templates, so I'm not sure what you mean there. So, at a guess, I think you mean that when you create an issue, the reporter defaults to you, and you can't change it. If that is right, then you need to do two things - make sure you have "change reporter" permission, and then make sure it is on the "create issue" screen. You'll then be able to set someone else as the reporter when you create the issue.
but I don't want to get all the emails as the default reporter.
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