exim allows much more customization. Most people don't need that level of customization, and postfix is definitely easier to use precisely because you just writ

exim allows much more customization. Most people don't need that level of customization, and postfix is definitely easier to use precisely because you just write settings, you don't write configuration logic. I'm still using exim, but not for any specific reason. It's just what I used in the beginning and I never had a reason to change.