Upon registering the user should get an email where he verifies himself to be a person before he can use the program, as is standard with other programs like Spotify,WhatsApp or Skype.
Upon stumbling over this issue I did some google searching and found Apache's "Commons Email" which looks quite interesting and could exactly fit to what we want to do.
Upon registering the user should get an email where he verifies himself to be a person before he can use the program, as is standard with other programs like Spotify,WhatsApp or Skype.