The 4.2.7 version of MailWing for Mac was available as a free download on our website. The software lies within Communication Tools, more precisely E-mail. This software for Mac OS X is a product of LutherFuller.
From the developer:
MailWing is an organizer and archiver for Apple's Mail. It requires Apple's Mail and OS X Leopard, Snow Leopard or Lion.
Any On My Mac mailbox can be linked to a unique Finder folder and messages are moved from a linked mailbox into its linked folder. Route messages into these mailboxes manually or automatically, using Mail's Rules.
You may want to check out more software for Mac, such as Encrypt Mail or EEAO, which might be related to MailWing.