hi , i am trying to install  iRedMail-0.8.5.tar.bz2
but it didn't complete.. it shows error below ................

Error: Package: clamd-0.97.8-1.el6.i686 (epel)
           Requires: libz.so.1(ZLIB_1.2.0.2)
Error: Package: lzop-1.02-0.9.rc1.el6.i686 (epel)
           Requires: liblzo2.so.2
Error: Package: lrzip-0.614-1.el6.i686 (epel)
           Requires: liblzo2.so.2
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
< ERROR > Installation failed, please check the terminal output.
< ERROR > If you're not sure what the problem is, try to get help in iRedMail
< ERROR > forum: http://www.iredmail.org/forum/

plsssss  help me .....