&gt; What&#x27;s the problem, exactly?<p>&gt; Most people are not capable of running their own mail server.<p>I think that is a big part of the problem.  It should be relatively straightforward for someone who isn&#x27;t a full-time email server administrator to setup a mail server correctly, but it&#x27;s not.  At least, it wasn&#x27;t easy last time I tried it with Postfix and (iirc) Courier on Ubuntu.  All the cryptography options are disabled by default and you have to spend a lot of time figuring out which ones should be turned on, where to stick the certificate files and how they should be formatted, how to get Courier and Postfix to talk to each other, etc...<p>Maybe there&#x27;s an easy solution (besides &quot;pay someone a monthly fee to manage this all for me&quot;) that I&#x27;m oblivious to, but it seemed like I was on a well-travelled path and it was a lot harder than it should have been.