Welcome to the #dominoforever Product Ideas Forum! The place where you can submit product ideas and enhancement request. We encourage you to participate by voting on, commenting on, and creating new ideas. All new ideas will be evaluated by HCL Product Management & Engineering teams, and the next steps will be communicated. While not all submitted ideas will be executed upon, community feedback will play a key role in influencing which ideas are and when they will be implemented.
For more information and upcoming events around #dominoforever, please visit our Destination Domino Page
Do I understand this right, you want to deliver inbound internet mail to an email address which shall not be visible to the users?
Not sure what your environment looks like, but the Domino SMTP relay server could be using an additional Domino Directory configured in Directory Assistence which only hosts those mail-in database documents or person documents. Other mail servers in your environment do not require this additional address book and so your normal users would not see those addresses.