In GMass, You may use our segmented campaign Instrument to find campaign recipients who did or didn’t do a particular action — then send a fresh campaign to those recipients. Deliverability is a big problem for bulk emailers. GMass has a complete suite of deliverability applications included: Spam Solver, https://freebookmarkpost.com/story17011870/how-send-bulk-emails-can-save-you-time-stress-and-money