Attention! We urgently recommend you not to use emails of these mail servers:
... @AOL.com
... @yahoo.co.jp
... @fuse.net
... @web.de
... @gmx.de
... @netcologne.de
... @prodigy.net
... @sbcglobal.net
... @comcast.net
... @att.net
... @bellsouth.net
Not all the emails is delivered to them, some answers and orders are lost.
We recommend to use any other mail server for contacts and orders!