Email is quite a bit safer than people think, especially if you host your own. Typically it is encrypted from point to point, so if a company emails me it goes through their internal system to their gateway, is encrypted using SSL and transmitted directly to my server where it's stored until I connect over an SSL encrypted link to download my mail

Even an ISP will have almost everything encrypted as it really is the default now

There's practically no chance for a man in the middle attack

I do accept unencrypted mail but nothing arrives on port 25 (unencrypted email) except scam attempts to get spam forwarded (which are denied)