I just completed my first mail merge to email a message to a lookup group (almost 650!) and it went well.
Now, my question is... How do I "mark" those records so that the next time I want to send out that message I ensure it goes only to subsequently-added contacts? We have a constant stream of contacts (students in my case) at various points in the process. Do I change their ID/Status to indicate progress through the process (like being set to ID/Status="Prospect 1" when created, "Prospect2" after they’re sent the first letter, etc), or is there some other/better way to do that?