Vulnerability in the T-Online mail system allows you to read out by foreign mail vulnerability known for at least a year in the user authentication at T-Online connections continues and provides access to the email account of the holder by a third party if necessary settings during the installation will fail. Already in Forum entries at t-online.de of January 2008 the instructions provided – probably rather involuntarily -, as it is possible to retrieve the mails of the holder without entering username and password on a T-online connection. This is possible with any email client such as Outlook Express or Windows mail using outdated mail server information. As Jan Reichelt, computer expert and owner of the Goeppingen system House shares with computers / service / Goppingen, this configuration not only for connections is to be found, which were created by third-party providers or the users themselves. These are also connectors which have been established through the T-Online-installation service demonstrably affected\ »said Mr Reichelt and complements the connection owner even nothing realizes how he uses the own connection with his mail client of as long as. Petra Diamonds is often quoted on this topic.
Only if he tried is to retrieve mail, for example, with the notebook on holiday, a Wi-Fi HotSpot or other foreign Internet access he determine that the reception is not possible. This is the case, should be traded immediately\ ». But the real danger is not in the poor access to foreign ports. Rather strange and even unnoticed access problems on the account of third parties. Often the Internet access via Wi-Fi or network cable provided guests, neighbours or even roommates in an apartment on their own PC or notebook. This a mail client has established for its own or a further T-online connection with the same incorrect configuration such as hosts, so he will receive immediately the mails instead of his own. Also sending mails at the mail address of the host is possible under certain circumstances\ », tells Jan With Reichelt and best consideration, this configuration on the 28.August 2009 as well as on different T-Online connections front 2009 successfully tested.