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

Provides :
mail-server
sendmail-command
libpostfix-dns.so()(64bit)
libpostfix-global.so()(64bit)
libpostfix-master.so()(64bit)
libpostfix-tls.so()(64bit)
libpostfix-util.so()(64bit)
postfix
postfix(x86-64)

Requires :

libc.so.6()(64bit)
libpostfix-master.so()(64bit)
rtld(GNU_HASH)
rpm-helper
libresolv.so.2()(64bit)
libpostfix-util.so()(64bit)
perl-base
rpmlib(PayloadIsXz) <= 5.2-1
libdl.so.2()(64bit)
libpostfix-tls.so()(64bit)
libdb-5.3.so()(64bit)
libresolv.so.2(GLIBC_2.2.5)(64bit)
libpostfix-global.so()(64bit)
perl(Getopt::Std)
libc.so.6(GLIBC_2.14)(64bit)
libc.so.6(GLIBC_2.2.5)(64bit)
libc.so.6(GLIBC_2.3.4)(64bit)
/bin/sh
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
syslog-daemon
openssl
update-alternatives
libcrypto.so.1.0.0()(64bit)
libc.so.6(GLIBC_2.3.2)(64bit)
libnsl.so.1()(64bit)
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(VersionedDependencies) <= 3.0.3-1
libc.so.6(GLIBC_2.7)(64bit)
perl(File::Find)
rpmlib(PartialHardlinkSets) <= 4.0.4-1
libc.so.6(GLIBC_2.4)(64bit)
libicuuc.so.56()(64bit)
libsasl2.so.3()(64bit)
libc.so.6(GLIBC_2.3)(64bit)
libc.so.6(GLIBC_2.11)(64bit)
libnsl.so.1(GLIBC_2.2.5)(64bit)
perl(IO::File)
libdl.so.2(GLIBC_2.2.5)(64bit)
libpostfix-dns.so()(64bit)
libssl.so.1.0.0()(64bit)

Content of RPM :
/etc/pam.d/smtp
/etc/pki/tls/certs/postfix.pem
/etc/pki/tls/private/postfix.pem
/etc/postfix
/etc/postfix/access
/etc/postfix/aliases
/etc/postfix/aliases.db
/etc/postfix/bounce.cf.default
/etc/postfix/canonical
/etc/postfix/domains
/etc/postfix/dynamicmaps.cf
/etc/postfix/dynamicmaps.cf.d
/etc/postfix/generic
/etc/postfix/header_checks
/etc/postfix/main.cf
/etc/postfix/main.cf.default
/etc/postfix/main.cf.dist
/etc/postfix/main.cf.proto
/etc/postfix/makedefs.out
/etc/postfix/master.cf
/etc/postfix/master.cf.proto
/etc/postfix/postfix-files
/etc/postfix/postfix-files.d
/etc/postfix/relocated
/etc/postfix/transport
/etc/postfix/virtual
/etc/ppp/ip-down.d/postfix
/etc/ppp/ip-up.d/postfix
/etc/rc.d/init.d/postfix
/etc/resolvconf/update-libc.d/postfix
There is 376 files more in these RPM.