Is there any way to decrease the size of the Mailfilter binary?
For users of UNIX-like systems, yes. When installing the program, running ‘make install-strip’ instead of ‘make install’ will strip the binary as it installs it, drastically decreasing its size. If you’ve already installed mailfilter, but still wish to strip the binary, become root, and use the strip command. See the manual page of strip(1) for more information.