The docs state:
Enabled (secure HTTPS access only) - Allows users to connect only through a secure SSL connection. This is strongly recommended because a regular HTTP connection transmits your mail account password across the network (or Internet) in plain, unencrypted text.
Enabled (HTTP or HTTPS) - Allows your users to connect through a secure or an insecure web connection.
However on my webmail activation dropdown I only have Allow HTTPS (secure) only. How do I modify the server to allow non secure access?