As I've put in the subject. I am not going to allow anyone on my server to use mail or mailing lists locally, all the virtual hosts are going to use Google Apps, which includes Gmail's support for for the domains.
In this case, do I need the following packages at all:
mailman postfix procmail sendmail spamassassin wbm-virtualmin-mailman wbm-virtualmin-signup
Can I remove them without harming the functionality of my CentOS+Virtualmin installation or do them (or samoe of them) have to be there and activated for proper functioning some php scripts for example? Which ones I can remove for sure?