I've been using Mail Merge for quite a few years. It took some learning at the beginning, but I use it effortlessly and well now. My experience is all with CSV file as source, and "send now" without any other options, and the program works flawlessly. Love it. Couldn't live without it. Alex, why don't you have a "donate" button? Unless you're filthy rich, I'd like to improve your life a little as thanks for improving and simplifying mine!