It's included in the libexo-1-0 package. In Debian and Ubuntu, the file is installed in an arch-specific location to allow 32-bit and 64-bit applications to coincide as needed.
/usr/lib/x86_64-linux-gnu/xfce4/exo-1/exo-compose-mail-1
It's included in the libexo-1-0 package. In Debian and Ubuntu, the file is installed in an arch-specific location to allow 32-bit and 64-bit applications to coincide as needed.
/usr/lib/ x86_64- linux-gnu/ xfce4/exo- 1/exo-compose- mail-1