Thanks so much for the reply, falko...
There's nothing on the log related to the problem.
This morning, I tried, stopping the 'firewall' of the server and it seems that it works. the 'dig www.google.com' works out fine and it did gave an answer, also to www.yahoo.com
, and even my url.
however, I am still waiting for any responses as to the outcome of the emails I sent to and from my Mail System which also resides on the same server as mentioned before. As of this writing there are no emails yet received on both recipients.