# Functions
New new message.
# Constants
DeafultAttachContentType default attach Content-Type.
DeafultContentType default embeded Content-Type.
HeaderDate header Date.
HeaderFrom header From.
HeaderMimeVersion header Mime-Version.
HeaderSubject header subject.
HeaderTo header to.
HeaderToBCC header to blind carbon copy.
HeaderToCC header carbon copy.
# Interfaces
Interface is an interface of message.
# Type aliases
Header names.