Here are the items removed when removing postfix:
Nov 1 09:56:59 localhost yum[22042]: Erased: google-chrome-stable
Nov 1 09:57:00 localhost yum[22042]: Erased: redhat-lsb-compat
Nov 1 09:57:00 localhost yum[22042]: Erased: redhat-lsb
Nov 1 09:57:01 localhost yum[22042]: Erased: redhat-lsb-graphics
Nov 1 09:57:01 localhost yum[22042]: Erased: redhat-lsb-printing
Nov 1 09:57:02 localhost yum[22042]: Erased: redhat-lsb-core
Nov 1 09:57:03 localhost yum[22042]: Erased: sysstat
Nov 1 09:57:04 localhost yum[22042]: Erased: crontabs
Nov 1 09:57:05 localhost yum[22042]: Erased: cronie-anacron
Nov 1 09:57:06 localhost yum[22042]: Erased: cronie
Nov 1 09:57:07 localhost yum[22042]: Erased: postfix
Seems odd to me that those items would need to be removed just because
postfix is removed.
Thanks,
-wes