itsasylum You can also manually do this to control your services and try if they run like this. Login into your main root Centos panel (SSH) and type these commands:
Postfix:
postfix reload
Then
postfix start
If the Postfix does not start automatically tho.
Then Dovecot:
service dovecot restart
For automatically reload Dovecot on next boot:
chkconfig dovecot on
I hope this changes the status of your email configurations and hopefully you get the data going smooth.