Tips to Strengthen Your E-mail Campaigns

When testing, be sure to send all your e-mails at the same time, and make clear notes about what you're testing and which group is getting the control version. Also make sure your test groups are a significant quantity.

According to MarketingSherpa, 50 percent of people will open an e-mail in the first nine hours after they receive it; 75 percent of people will open it in the first 28 hours; and the remaining 25 percent may take several days to open it. They also report that the average e-mail campaign has its peak open rate in 14 days, Van Diest said.