Solution: BCC Blind Copy in Outlook
Guide:
1. Opena new email in Microsoft M S Outlook
2. Enter your own email address in the recipient field [To] or an alias email address such as: Newsletter@IhreDomain or NoResponse@ihreDomain
3. Click cc and write all your email recipients in the [Bcc] box
4. After that, your Bcc field is visible for editing in the email editor and you can send your email