Mail::Box

Above shows my Mail::Box objects. Close observers see the difference between the Mail::Box-approach and the Mail::Folder set-up. The specialisation is broken-up further, till now without replacing the existing modules.

The Mail::Box::Message extends the MIME::Entity for instance by containing a sequence-number within the folder, which is not a habit of a basic message. The Mail::Box::Mbox::Message extends a normal folder message even further, containing information about where in the folder-file, the message was found. This is not the case for Mail::Box::MH::Message's, where each message has a file-name related to it.

One of the main targets of OO-design is to find characteristic knowledge and functionality, and split it into different objects, in stead of throwing all on one huge pile.