yum - CentOS 5.5 php-posix with dependency error php53-common

I'm having problems installing php-posix. The problem I have, is that I used epel.repo and now I can't work out how to get past this. I'm not great with Redhat & yum.

[root@badelivery ~]# yum  install php-posix
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * addons: mirrors.liquidweb.com
 * base: mirror.atlanticmetro.net
 * epel: mirror.cogentco.com
 * extras: centos.aol.com
 * updates: mirror.ash.fastserv.com
addons                                                                                                  | 1.9 kB     00:00     

base                                                                                                    | 1.1 kB     00:00     
epel                                                                                                    | 3.7 kB     00:00     
extras                                                                                                  | 2.1 kB     00:00     
updates                                                                                                 | 1.9 kB     00:00     
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package php53-process.x86_64 0:5.3.3-22.el5_10 set to be updated
--> Processing Dependency: php53-common = 5.3.3-22.el5_10 for package: php53-process
--> Running transaction check

---> Package php53-common.x86_64 0:5.3.3-22.el5_10 set to be updated
--> Processing Conflict: php53-common conflicts php-common
--> Finished Dependency Resolution
php53-common-5.3.3-22.el5_10.x86_64 from updates has depsolving problems
  --> php53-common conflicts with php-common
Error: php53-common conflicts with php-common
 You could try using --skip-broken to work around the problem
 You could try running: package-cleanup --problems
                        package-cleanup --dupes
                        rpm -Va --nofiles --nodigest

I used EPEL to get fail2ban running, but what I didn't realise is that it has updated my php packages.

[root@badelivery ~]# rpm -qa | grep remi
php-xmlrpc-5.3.5-1.el5.remi.1
php-gd-5.3.5-1.el5.remi.1
php-mysql-5.3.5-1.el5.remi.1

php-pear-1.9.1-6.el5.remi
php-odbc-5.3.5-1.el5.remi.1
mysql-server-5.1.54-1.el5.remi
php-xml-5.3.5-1.el5.remi.1
php-devel-5.3.5-1.el5.remi.1
php-snmp-5.3.5-1.el5.remi.1
mysql-libs-5.1.54-1.el5.remi
mysql-5.1.54-1.el5.remi
php-mcrypt-5.3.5-1.el5.remi.1
mysql-bench-5.1.54-1.el5.remi

php-5.3.5-1.el5.remi.1
mysqlclient15-5.0.67-1.el5.remi
php-cli-5.3.5-1.el5.remi.1
php-common-5.3.5-1.el5.remi.1
php-mbstring-5.3.5-1.el5.remi.1
php-imap-5.3.5-1.el5.remi.1
php-ldap-5.3.5-1.el5.remi.1
mysql-devel-5.1.54-1.el5.remi
php-pdo-5.3.5-1.el5.remi.1

It looks like php-postfix is not available on epel.

If I remove php-common, a lot of dependencies will be removed, which I think will lead to a lot of problems.

Is there way to solve this without a lot of pain. This is a prod server.
thanks!