add these lines:
cd /mnt to view the contents
Eject CD/DVD ROM
Find CUSTOM1_LOG and edit the content to:
CUSTOM1_LOG = "/var/log/maillog"
Add the regex to catch the failed attempts against SASL
Add the below regex between "Do not edit before this point" and "Do not edit beyond this point":
Solve nss-softokn problem on CentOS 6