An absolutely disgusting company. Zero customer service, arrogant beyond belief. They literally don't care about you. Even if you've been with them for years. My email address was used for business and was rendered unusable. I contacted customer service and got a generic response which didn't even deal with the issue. I suspect what's happening is that long term 'free' users are being targeted to try and push them into going premium. When I sent them another email to say their generic cut & paste response wasn't relevant to my issue, they blocked me from being able to submit complaints.
Stay away from this email service. Don't ever use it for anything important or you'll suffer eventually.