This question was asked a long time ago by another, but no answer came forth. See link below.
I have a user that wants the alarm display not to pop up but does want an email sent. There seems to be no way to get the email w/o also getting the pop-up display.
Previously asked link
http://www-10.lotus.com/ldd/nd6forum.nsf/0/6f83be662e25383a85256e1d00411d1b?OpenDocument&Click=