when i want to send any message to another client, most of the times i try to do that i get this sentence: "In order to avoid spam messages, this user requires you to solve a captcha before you can send a message to him. However your client does not support captchas, so you will not be able to chat with this user.", so i think it would be a good thing to have captchas in order to have a better integration with emule users
