I made a new installation of zimbra (v.8) on a CENTOS 6x64, and all emails that I send to gmail / hotmail / yahoo go directly to the spam folder.

I'm two days researching alternatives and so far, not got nothing, I tested several configurations of DNS and SPF record, but made ​​no effect, I tried to change the MIME but also not worked.

I did tests on several sites like DNSStuff, and not show any error.

Anyone have any suggestions?

My IP adress is 192.80.190.93 e my domain is dotcwb.com.br.

My DNS configuration:

$ORIGIN dotcwb.com.br.
$TTL 1H
dotcwb.com.br. IN SOA vm.dotcwb.com.br. contato.dotcwb.com.br. (
2013050707 ;serial.
24H ;refresh.
1H ;retry.
1W ;expire.
6H ) ;minimum.
IN NS VM
IN NS NS1
IN NS NS2
vm.dotcwb.com.br. IN TXT "v=spf1 a mx mx:vm.dotcwb.com.br ip4:192.80.190.93 -all"
IN MX 10 vm.dotcwb.com.br.
localhost IN A 127.0.0.1
@ IN A 192.80.190.93
www IN A 192.80.190.93
mail IN A 192.80.190.93
ns1 IN A 192.80.190.93
ftp IN A 192.80.190.94
ns2 IN A 192.80.190.94
vm IN A 192.80.190.93
ts IN A 192.80.190.93