Per bento logs, this isn't building on 5.x right now. Perhaps this update will help. The main website claims that it fixes various ANSI bugs. How-To-Repeat: (bento logs)
Responsible Changed From-To: freebsd-ports-bugs->erwin I'll handle this. It still doesn't compile on 5.x (http://panda.droso.net/~erwin/mmail.log) I'll mark it IGNORE
State Changed From-To: open->closed Committed, thanks!