xmh 6.8.2-10.2 (amd64 binary) in ubuntu hoary

 xmh provides a graphical user interface to the MH (Message Handler) mail
 system. xmh is a very old X client and is not exactly a "living" piece of
 software. MH users will probably prefer the exmh package, which serves the
 same function and continues to be actively developed.
 .
 The xmh program uses bitmap images provided by the xlibs-data package.