When should you stop sending emails to people who have stopped opening them? It depends, but general advice says six months for high-frequency senders and 18 months for low-frequency senders. (CMSWire; h/t Inbox Reads)
Tilt Take: Culling your email lists from those who aren’t opening them can immediately boost your open and click-through rates. But before you do, send a last email letting them know just in case they want to renew the relationship.
