I noticed my an etire conversation through Kongregate mail disappear – that is confusing at least. That concerns mails sent and mails received from one particular user.
Did I get blocked? Is it normal? Or is it a bug?
It might just be your email settings. Check if you didn’t set your provider to delete old messages. Once a message is sent to your email account, the website shouldn’t have power over it. If you’re referring to private messages, the receiver might’ve deleted them.