He felt a small sting, less sharp than gratitude, more like the pleasant ache after a good run. He typed a reply into the empty compose box—not to an address but into the app itself, because by then the place felt like a room where you could toss messages into a pocket of air and a breeze might catch them.

This is a subscription-based model. Recent pricing lists this around $4.03 per user, per month , billed annually.

Select and then navigate to the About Mailbird tab.

A licence key is a unique code provided to users who purchase a software license, in this case, Mailbird Pro. It's used to activate the full version of the software, unlocking all premium features.