The reason for this behavior is to optimize the move/delete process by not having to reorganize a mailbox every time a message is removed from it. As mailboxes can become very large, and messages can usually be moved around without limitation, this can provide a considerable time-saving. However it also means that when you process a mailbox with Aid4Mail, the mailbox can potentially contain unpurged messages.
If you experience any issues, please don’t hesitate to contact us.
If you would like to buy an Aid4Mail license, please visit the Aid4Mail website.