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.
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I think this is in already: you can delay mail send, similar to OL, but with the benefit that it works on the server and therefore the user can logoff.
https://help.hcltechsw.com/domino/10.0.1/sched_messages.html
Is this what you need?