MailBee Message Queue
MailBee Message Queue is a queue-based email-sending system which operates as a Windows NT service intercepting "send e-mail" requests from MailBee SMTP and MailBee.NET SMTP components and then sends email in the background. This allows the components to operate very quickly because they no longer have to wait for email messages to be actually sent. It is especially important when your application sends multiple messages at once. No knowledge of SMTP protocol is required.