From address is replaced with auto generated internet mail address

Hi all,

some users do have a problem when sending emails to the internet, their internet address generated similar to the one bellow.

John_Dow/MyCompany/DE%MyCompany@mycompany.de

The problem is that the user does have in his personal address book valid internet name and in Address Book; there is a correct email address as well.

In Global Domain configuration document is the Internet address lookup enabled. However it is working the same with both options.

The most interesting thing is that it is generating this nasty thing only for recently registered users, the others are ok.

Any idea, how to get rid of this?

Thank you

Pepa