本日は TIdMessage を眺めて終わり
 日本語のヘルプは kylix用のを発見 中身を見るとテキストだけ取り出せば・・・いや犯罪か

TIdMessageにとりあえず必要な構造は揃っているようす ストリームへの読み書き関係があれば
保存が簡単なので調べるのは明日にしよう。

  property Subject: string
  property Body:  TStrings
  property From:  TIdEmailAddressItem
  property Sender: TIdEmailAddressItem    
  property ReplyTo: TIdEmailAddressList
  property CCList: TIdEmailAddressList
  property BccList: TIdEmailAddressList

  property AttachmentEncoding: string    
  property CharSet: string
  property ContentType: string
  property ContentTransferEncoding: string
  property ContentDisposition: string
  property Date: TDateTime
  property Encoding: TIdMessageEncoding
  property ExtraHeaders: TIdHeaderList
  property NewsGroups: TStrings
  property NoEncode: Boolean         
  property NoDecode: Boolean
  property Organization: string       
  property Priority: TIdMessagePriority
  property ReceiptRecipient: TIdEmailAddressIt
  property Recipients: TIdEmailAddressList  
  property References: string
  property UseNowForDate: Boolean