Sendmail issue on CentOS 7 (Log permission denied in /var/log/maillog)

Apache/PHP on CentOS 7 unable to send emails using sendmail

See log in /var/log/maillog file should shows following error:

[root@linuxcnf ~]# grep Permission denied /var/log/maillog “sendmail [4884]: NOQUEUE: SYSERR(apache): /etc/mail/sendmail.cf: line 0: cannot open: Permission denied” ……….

Quick Solution

Option -1: Disable Selinux and restart the server:

[root@linuxcnf ~]# vi /etc/sysconfig/selinux # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: #     enforcing - SELinux security policy is enforced. #     permissive - SELinux prints warnings instead of enforcing. #     disabled - No SELinux policy is loaded. SELINUX=disabled # SELINUXTYPE= can take one of three two values: #     targeted - Targeted processes are protected, #     minimum - Modification of targeted policy. Only selected processes are protected. #     mls - Multi Level Security protection. SELINUXTYPE=targeted :wq [root@linuxcnf ~]# service httpd restart

Change from enforcing to permissive or disabled and reboot the server.

Option -2: Or use the below command to enable selinux security for apache to send mail:

[root@linuxcnf ~]# setsebool –P httpd_can_sendmail on [root@linuxcnf ~]# service httpd restart

Now apache/php should able to send mail using sendmail service.