======Nützliche RfCs======

  * [[http://www.rfc-editor.org/rfc/rfc821.txt|RfC 821: SIMPLE MAIL TRANSFER PROTOCOL]]
  * [[http://www.rfc-editor.org/rfc/rfc822.txt|RfC 822: STANDARD FOR THE FORMAT OF ARPA INTERNET TEXT MESSAGES]]
  * [[http://www.rfc-editor.org/rfc/rfc1413.txt|RfC 1413: Identification Protocol]]
  * [[http://www.rfc-editor.org/rfc/rfc2821.txt|RfC 2821: Simple Mail Transfer Protocol]]
  * [[http://www.rfc-editor.org/rfc/rfc2822.txt|RfC 2822: Internet Message Format]]