Encrypt with SMIME for Domain

Hello Community,

we want zu Encrypt outgoing Mails with SMIME, we have installed the CA Root Certificate and the Certificate for the Encryption, we have bild the Certificate Binding, the Security Profil und the rule for the outgoing Mails. If we change the Address Pattern in the Certificate Binding to smime@XXX.de the Mail will be encryptet, but we would like to send encrypted Mails to all XXX.de, not only to one address. We tried a lot of solutions (*.XXX.de, XXX.de, *@XXX.de, @XXX.de) but nothing work! In the Adminguide only show how to install the address pattern for one Mailaddress not for the domain. Please can somebody show us the right way.

Thanks

Thorsten