Externer Client:

X-Greylist: Passed host: 178.201.XXX.XXX
Received: from 10.0.123.123 (ip-178-201-XXX-XXX.unitymediagroup.de [178.201.XXX.XXX])
	(Authenticated sender: sender_email@arcor.de)
	by mail-in-04.arcor-online.net (Postfix) with ESMTPA id 68E03AAC6D
	for <info@domain.de>; Thu, 31 Oct 2013 22:40:05 +0100 (CET)

^^^^ Achtung, interne IP, öffentliche IP und Reverse-DNS enthalten!


Webmailer:

Received: from [178.201.XXX.XXX] by webmail18.arcor-online.net (151.189.8.76) with HTTP (Arcor Webmail); Thu, 31 Oct 2013 23:22:30 +0100 (CET)
X-WebmailclientIP: 178.201.XXX.XXX

^^^^ Achtung, öffentliche IP enthalten!