@Rodrigo-Carvalho-0, those emails are meant to tell users who don't have a TRIGGERcmd subscription why their command didn't run.
You must have an Alexa routine that's trying to run multiple commands every hour. Could you disable or delete that routine?
Otherwise, I could add an option in your profile page for non-subscribers to disable those emails - they'll just silently fail because you're not subscribed and you're trying to run multiple commands in 1 minute.