A right mouse click on a misspelt word will pop-up a menu of suggested spellings. The Detach button, which will remove a selected attachment. The Attach button, which lets you select a file to attach to your message. Next comes the message body you are composing, and then the attachments list. This window lets you browse your hierarchy of mailboxes.
Postilion comfortably manages hundreds of mailboxes.
From this window, you can double click on a mailbox to open it in the current Browser window, or in a new window if none is selected. Using the cut and paste options, you can rearrange the hierarchy. The buttons at the bottom give access to the most often used functions. The Open button will open the selected mailbox in a new Browser window. This window lets you edit all of the features associated with a particular mailbox.