My last Email Insider column ("Email Industry Disagreements: Where Do You Stand?") touched off the start of some good debate over single vs. double opt-in (also called confirmed opt-in) that went ...

If you’re concerned about the quality of your email list, it may be time to embrace double opt-in. This will help you verify the degree of a customer’s interest. Here’s an explanation of how it works.

When you visit a website, you’ll often see a pop-up window presenting the option to enter your email address to receive a discount or free shipping. After entering your email address, you can take ...