Fail2Ban Environment

[root@ip22 fail2ban]# cat /etc/redhat-release
CentOS release 6.10 (Final)
[root@ip22 fail2ban]# rpmdb -qa | grep fail2ban
fail2ban-0.9.6-1.el6.1.noarch
[root@ip22 fail2ban]# rpmdb -qa | grep mail
mailx-12.4-10.el6_10.x86_64
qmail-pop3d-1.03-529.rhe6x.iworx.jms.chkuser.esmtpa.ipv6.isoc.x86_64
libreport-plugin-mailx-2.0.9-34.el6.centos.x86_64
qmail-1.03-529.rhe6x.iworx.jms.chkuser.esmtpa.ipv6.isoc.x86_64
maildrop-1.8.0-105.rhe6x.iworx.x86_64
qmail-autoresponder-2.0-14.el6.iworx.x86_64
qmailanalog-0.70-5.iworx.x86_64
vpopmail-5.4.33-129.rhe6x.iworx.x86_64
mailcap-2.1.31-2.el6.noarch