Check whois database. Also Ladar Levison twitter: https://twitter.com/kingladar https://twitter.com/kingladar If he lost control of his domain, he will tweet

Check whois database. Also Ladar Levison twitter: https://twitter.com/kingladar https://twitter.com/kingladar If he lost control of his domain, he will tweet about it. I guess your point is that he is using Let's Encrypt instead of CA that would verify person or Lavabit LLC identity. In this case, it is not really an issue. If you are not going to check the cert manually every day, pinned Let's Encrypt cert is not way worse given that you have other means to verify ownership.