[pedrovalmor]

Originally Posted by falko

Do you have valid nameservers in /etc/resolv.conf? Also make sure that your server isn't blacklisted: http://mxtoolbox.com/blacklists.aspx

The ip of my server isn't blacklisted.

well... i have this ips in "/etc/resolv.conf":

200.255.255.66
200.255.255.70

this ips it's from my provider "Embratel / Brazil"... and I think it's ok, but I'll try to change to OpenDNS ips and later I'll post the results here.

many tks man!!!