To allow files in a directoy to be served by Apache with SELinux enabled:

chcon -R -t httpd_sys_content_t <directory>
 

To check on the files security permissions use:

ls -RZ <directory>
 

To allow Apache to send emails use:

setsebool -P httpd_can_sendmail 1

To check if the permission is on or off, use:

/usr/sbin/getsebool httpd_can_sendmail