MailBee.NET Queue is available for use by owners of MailBee.NET SMTP and MailBee.NET Objects.
If you already own these products then your current license key should work with MailBee.NET Queue.
If you do not own a license then you will need to purchase MailBee.NET SMTP or MailBee.NET Objects licenses in order to use MailBee.NET Queues.

One software license is required per developer.
Run-time royalty free.

Maintenance
Purchasing any product of AfterLogic entitles you to 1 year of free maintenance of that product since the moment of purchase. The maintenance includes all major and minor updates released for that product during the year and the standard technical support.
The maintenance period can be prolonged on annual basis.

Extended Support
Entitles you to high-priority helpdesk and e-mail support and extended trouble-shooting assistance for 1 year.
If combined with "2nd year maintenance", Extended Support for 2nd year is free.