Encoding property defines encoding algorithm used to
send attachment inside email message. Most common is
BASE64, and is widely used among
mail clients. BINHEX4 is used
mostly by Macintosh users, and UU
is old algorithm used among UNIX clients.
wodMailbox will try to find information about encoding
from message headers, if possible. If this information is
found, Save method when
used will automatically decode attachment properly and save
it to local file.