How do I stop and edit an email broadcast
On the reporting tab, you can stop a broadcast that is either scheduled, or is on the way out. You can’t recall sent emails however.
You would then need to tag the people that it has already sent to (so you can exclude them from the next bit)
Back into creating a new email, use previously sent, so you can grab it and edit.
Then in recipients exclude the people that already had it
Hope that helps
PS there are probably other ways of doing it that might be easier, but thats off top of my head