arplabs@gmail.com wrote:
> Thanks Greg. After some thought, I'm thinking it's a DNS issue too.
> I'm gonna call the admin for the site (labramo.com.br) and have him do
> it right and get this over with.
> Thanks for your time!!
>
> Aless.

Actually, I meant a problem with your DNS, as labramo.com.br seems to
resolve just fine from here.

For exanple: Do you run Postfix in the "chrooted" mode ? If so, there can be
problems such as you are having with the chrooted copy of /etc/resolv.conf.

Otherwise, what happens when you run the commands:

dig MX labramo.com.br
dig A labramo.com.br


--
Greg