Zeyple integration for Postfix

[alexanderadam]

Is your feature request related to a problem? Please describe.

Let me cite the Zeyple README:

Why should I care? If you are a sysadmin who receives emails from various monitoring tools like Logwatch, Monit, Fail2ban, Smartd, Cron, whatever - it goes without saying that those emails contain lots of information about your servers. Information that may be intercepted by some malicious hacker sniffing SMTP traffic, your email provider, <insert your (paranoid) reason here>... Why would you take that risk - encrypt them all!

Describe the solution you'd like

It would be nice to integrate Zeyple in the setup.

Describe alternatives you've considered

Sending plain text emails without any encryption