PerfectMail has a queue where messages are kept during tranmission. If there is a message delivery issue the message may remain in the queue for a period of time. The "Dashboard" displays the number of messages queued in the "Queue" box, along the right hand side-bar.

Click on the "Queue" title or follow the menus to "E-mail => Queued Mail" to see what messages are currently queued. Using this screen you can investigate the reasons why a message is queued; delete queued messages; or immediately attempt to deliver queued messages.