Hi,
I would suggest you explore the possibility of using a DataTable Object for this. Especially if you have a bunch of personnel.
You can have the operators listed (their email address I guess) in one column (with .txt type for the cells). And have a second column: tie a switch to each of the cells in this column. This column will represent whether or not the operator is available. You flip a switch on a panel to represent the availability of the operator and the cell's value changes to OFF, for instance.
The next step would be for your mailer object (or something preceding it) to pick only those personnel from the first column of the DataTable whose second column value is ON (or TRUE) at that point of time.
This may be setup by using t
he DataTable cursor and a Counter to march down the rows, checking for Column two's value in that particular row. I will have to give some thought as to how exactly the logic would work -- this is more of a "chalkboard answer" ..for now.
Hope this gives you some ideas.
Regards,
Khalid