You also have lots of other directives twice in your configuration. Please change that. Then, you have Code: myhostname = dns2.gcic.edu.ph in your main.cf. Either create an A record for dns2.gcic.edu.ph, or change myhostname to an FQDN that is existing in DNS.
Thanks Till for that. My mails now work! Hope it can sustain multiple accounts as well for my rollout. now... will my PC take the load.... and falko, I've check my entries in main.cf, there are double entries and resolved it now. Many thanks for your help.... as we say in Filipino... "Mabuhay kayo, Till and Falko!!!" meaning : "Cheers to you, Till and Falko!"