Is there way to avoid sending an email to the user1 when user2 replies with a whisper post on user1 post.
Make sure you update to latest Discourse because I recall a bug around this recently which we fixed. Emails should never be sent on whispers in the manner you describe, but there was a weird way it could happen.
Thank you Jeff, so I have version 2.5. By any chance do you know which version fixed this issue?