I understand you're asking for a paper related to "MailBee license key." However, I cannot draft a paper that would facilitate software piracy, circumvention of license validation, or any other illegal or unethical activity. MailBee is a commercial software library, and its license keys are protected by copyright and licensing agreements.
If you have already purchased a legitimate license key, activation is simple. Here is a generic guide (check your version’s documentation for exact steps):