Resending to non-openers means taking a campaign that has already been sent and sending it again, usually a day or two later, only to the people who didn’t open it the first time. The content stays mostly the same, but the subject line and often the preheader change. The idea is that many people missed the email rather than rejected it.
It works best for emails with real time value: a sale ending, an event with limited seats, an important announcement. A second chance with a different angle (“Last day: 30% off ends tonight” instead of “Our biggest sale of the year”) can bring in a meaningful number of extra clicks and orders from the same piece of content.
There are real costs. People who chose not to open now receive the same email twice, which can feel pushy, and some of them will unsubscribe or complain. Because privacy features record false opens, your “non-openers” group is also incomplete: people whose mail app loaded the email automatically count as openers and are left out, even if they never read it. Basing the resend on non-clickers can be more accurate for some campaigns.
Use it sparingly, perhaps for your two or three most important campaigns a month. Wait at least a day so the email doesn’t look like a duplicate, exclude anyone who clicked or bought, and watch unsubscribe and complaint rates on the resend separately. If they rise noticeably, cut back.
A Mumbai cinema chain announces advance booking for a big Diwali release on Monday. On Wednesday it resends to everyone who didn’t open, with the subject “Only a few recliner seats left for opening night”. The resend brings in a third as many bookings as the original send.
MailNesto can resend a campaign in one step to people who didn’t open it (or didn’t click), with a new subject line, either straight away or at a scheduled time.