Can I Use my Mailbird Business License Key for More than One Computer? Leonardo Santoso February 18, 2021 11:56 Updated Follow Yes. Mailbird Business is licensed per seat (i.e. per unique individual user) for up to three (3) devices. Related articles What is the Difference between Mailbird for Business and Mailbird Personal? Activating Mailbird License Business Licensing FAQ Is Mailbird free for use? I Can't Find My Mailbird Business License Key Comments 0 comments Article is closed for comments.