Super cheap, very reliable and easy to setup. Never had any issues in the years I've been using it. I'm not associated with them, just a happy user that wishes them all the best.
If nothing else, it's one of the more honest pieces of company writing out there, although some of the things could be dealbreakers for some people. I suggest that you check it out, it's written in a pretty straightforward and easy to understand language and lays everything bare.
Either the client is bundled with email, but then the email doesn't support multidomain and multi user (or have to pay for each, which is bad), or it's just not shared between web and android.
If I could solve this, I would be able to uninatall gmail, which right now I use uniquely as an email client.
Not being able to spawn random addresses (payments@, contact@) without paying really turns me off a lot of other providers.