Email struggles

Hi,
Just curious if most people use email, or mail on this? Or just gave up and use Outlook Thunderbird or whatever.

Mail app is just slow. Have tried so many different setups and just crawls making it unusable for me.

RainLoop I cant even get the settings page.

I have done several different freenas jail configurations. All behind pfsense and haproxy for ssl terminationā€¦ Current setup has no issues on the settings warnings. And everything works fantastic except that email seems to be touchy.