Configurate SMTP on dedicated server and webmin

I forget to setup my SMTP on my server Centos 6 the person need to setup smtp with postfix and opendkim, SPF, dovecot. I use webmin and SSH to neect on my server. the person need to connect on my computer with teamviewer or similar software to make the job on my server. I will choose someone between 1 and 3 hours and I will not choose you if you bid more then 30$ respect my budget. The server on ovh is already configured and I host my website since 2010. the SMTP service is there and not configured then I need someone who can configure it.