Done correctly, this once-maligned strategy can be a real boon to your list health.

By Catherine Algeri

In fact, many nonprofits bring in $5 to $10 in contributions for every $1 spent on e-mail append processing, according to the article “Email Append: Hot online strategy or too hot to handle?” in NPT’s March 15 edition. Considering that you can append multiple e-mail addresses for $1, there is a low level of investment required to find out how valuable your e-mail addresses will be — and the research is in your favor.