content: Account Deleted By User Posteo - has a poor interface and overly aggressive 'default' spam filter that actually intercepts SOME emails they deem guaranteed spam and never alerts you to this.. So hence, you never have a chance to actually see for yourself, they make that decision for you. Also, if I remember back there were security issues with their password system. So I wrote them off. I wasn't happy about 'disappearing' emails they deemed spam when I was EXPECTING those emails.. Tutanota - there is a unknown albeit not horrendously risky backdoor method to regain access to email accounts you've lost the password for. It's a pretty lame backdoor to be honest. Also without a 'search' function it's pretty annoying to use. They've reduced encryption to AES128 and nobody knows why. Otherwise the service is decent. Protonmail - I won't use them.. They got honeypotted by the Mossad and NSA awhile back with that staged DDOS attack. Then 'Radware' was ready and stepped in to rescue them with their Anti-DDOS pipe redirection crap through Radware controlled pipes. The problem is, Radware IS an Israeli Intelligence operation, has been implicated in spreading malware/MITM attacks, and has littered with Unit8200 Cyber Experts. The theory some have is this was the method used to get at least some access, metadata or otherwise to a system that was frustrating authorities. Currently I consider email privacy in the following order; Zoho - Best general email, not requiring serious privacy/security but a GREAT Gmail replacement. For anonymous, highly secure email I like: Startmail StartMail - Private & encrypted email made easy Msgsafe.io Most secure email - Free end to end encryption | MsgSafe.io Lavabit Securely Encrypted Email by Lavabit Msgsafe is very interesting and the interface is fantastic. It shows country of origin icon on each email and allows you to trace email path with a single click. Their server farms are WAY out of reach of any relevant authority or jurisdiction and falls in Curacao which has one of the strongest privacy based constitutions in the world. Try it out, it's free and quite interesting - and safer than Tutanota and Protonmail IMO.