Hello...
"Exceptions are for calls/ringtones, not messages"...I do agree in the meantime because my 8700v ignores all settings I make here, as far as message alerts are concerned. - However, the dialogs to me definitely look as if it
should be possible. Profile Exception for special sender, the Exception configured to a special Profile, that Profile configured for a certain behaviour when a message arrives. - Why does it not work

Did anybody get it to work in the meantime?
However, I am okay now with setting this sender up for Level 1 messages, as you suggested - and configure
them to be silent works fine. - The fact that I managed to find out where to configure this filter is only due to another post in this forum. It is well hidden.