When you enter a mailserver in the settings for MyMail the hostname is resolved. If that fails an errormessage is displayed "The Host '<hostname>' cant resolved. Using the old entry.". The hostname show is wrong. The hostname that is shown is the previous value that was entered.

To reproduce:
* Start configuration.exe
* Open the settings window for MyMail
* Enter a good mail-server in the box
* Now enter a nonexisting mail-server
* You will get the message that the "good mailserver" could not be resolved, but this should be the nonexisting.