Description:

"Email::Abstract" provides module writers with the ability to write
representation-independent mail handling code. For instance, in the
cases of "Mail::Thread" or "Mail::ListDetector", a key part of the
code involves reading the headers from a mail object. Where previously
one would either have to specify the mail class required, or to build a
new object from scratch, "Email::Abstract" can be used to perform
certain simple operations on an object regardless of its underlying
representation.

"Email::Abstract" currently supports "Mail::Internet",
"MIME::Entity", "Mail::Message", "Email::Simple" and "Email::MIME".
Other representations are encouraged to create their own
"Email::Abstract::*" class by copying "Email::Abstract::EmailSimple".
All modules installed under the "Email::Abstract" hierarchy will be
automatically picked up and used.