PostFix not receiving external emails

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http://serverfault.com – Right now i have postfix setup on a virtual server running suse and its able to send emails to [email protected] It is also able to send and receive emails for all the users on the host itself. But it can't receive emails from a gmail account and it can't send or receive emails on or from others users on different host in my domain. These are all the changes i made to the main.cf myhostname = host1.myDomain.bit mydomain = myDomain.bit myorigin = $myhostname inet_interfaces = all mydestination = $myhostname, localhost.$mydomain, localhost local_recipient_maps = unix:passwd.bynam (HowTos)