Mailbird user for many years.
I have been using and "old" version of Mailbird (2.0) for home use for many years now. It does everything that I require, and probably more.
Recently I had an Installation issue (to another platform) that I couldn't resolve. After contacting customer support my issue was resolved by Diego Martinez who answered my inquiry promptly and efficiently. The solution was easy to implement and worked perfectly.
Both the program and customer service are top notch.