SP

impl

Sender

header

SingleBodyExtension

BodyStructure

SingleBodyPart

BodyStructure

StandardEncoding

TransferEncoding

StringBodyExtension

BodyStructure

Subject

header

sender

Resent-Sender Sender Envelope

singleBodyExtension

impl

singleBodyPart

impl

size

BodyFields

spinoco

root

string

impl

subType

BasicMedia BodyTypeText

subject

Subject Envelope