Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
smtp_daemon
dict_ldap.so
dict_pcre.so
dict_tcp.so
libpostfix-dns.so.1
libpostfix-global.so.1
libpostfix-master.so.1
libpostfix-milter.so.1
libpostfix-tls.so.1
libpostfix-util.so.1
sysvinit(postfix)
sysvinit(sendmail)
sysvinit(smtp)
postfix
postfix(x86-32)

Requires :

libsasl2.so.2
/usr/sbin/usermod
libdl.so.2(GLIBC_2.1)
libdb-4.8.so
libpostfix-dns.so.1
libdl.so.2
grep
coreutils
libpostfix-tls.so.1
diffutils
libresolv.so.2
liblber-2.4.so.2
libc.so.6(GLIBC_2.4)
sysvinit(network)
libpostfix-global.so.1
libc.so.6(GLIBC_2.1.3)
sed
fillup
/bin/grep
fileutils
insserv
libc.so.6(GLIBC_2.7)
libpostfix-util.so.1
/usr/bin/getent
textutils
libldap-2.4.so.2
libpcre.so.0
libc.so.6(GLIBC_2.2)
libnsl.so.1(GLIBC_2.0)
libc.so.6(GLIBC_2.0)
/bin/awk
libc.so.6(GLIBC_2.1.2)
libpostfix-master.so.1
libdl.so.2(GLIBC_2.0)
libcrypto.so.1.0.0
/usr/sbin/useradd
/bin/sh
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
libc.so.6(GLIBC_2.11)
netcfg
libresolv.so.2(GLIBC_2.2)
libc.so.6(GLIBC_2.3)
sysvinit(syslog)
libc.so.6(GLIBC_2.3.2)
/usr/sbin/groupadd
iproute2
rpmlib(CompressedFileNames) <= 3.0.4-1
sh-utils
rpmlib(PartialHardlinkSets) <= 4.0.4-1
libc.so.6(GLIBC_2.1)
rpmlib(PayloadIsLzma) <= 4.4.6-1
libssl.so.1.0.0
/bin/sed
libpostfix-milter.so.1
/bin/bash
pcre
libnsl.so.1
libc.so.6
libc.so.6(GLIBC_2.3.4)

Content of RPM :
/etc/init.d/postfix
/etc/pam.d/smtp
/etc/permissions.d/postfix
/etc/permissions.d/postfix.paranoid
/etc/postfix
/etc/postfix/LICENSE
/etc/postfix/TLS_LICENSE
/etc/postfix/access
/etc/postfix/aliases
/etc/postfix/bounce.cf.default
/etc/postfix/canonical
/etc/postfix/dynamicmaps.cf
/etc/postfix/generic
/etc/postfix/header_checks
/etc/postfix/helo_access
/etc/postfix/ldap_aliases.cf
/etc/postfix/main.cf
/etc/postfix/main.cf.default
/etc/postfix/makedefs.out
/etc/postfix/master.cf
/etc/postfix/openssl_postfix.conf.in
/etc/postfix/relay
/etc/postfix/relay_ccerts
/etc/postfix/relocated
/etc/postfix/sasl_passwd
/etc/postfix/sender_canonical
/etc/postfix/system
/etc/postfix/system/cond_slp
/etc/postfix/system/config_postfix
/etc/postfix/system/update_chroot
There is 176 files more in these RPM.