Hi there

I got this problem for sending mails outgoing mi LAN:

Code:
Feb 8 22:12:19 myserver postfix/qmgr[25081]: 31E2DA8734: to=<recipient@gmail.com>, relay=none, delay=0, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=gmail.com type=MX: Host not found, try again)
I think my /etc/resolv.conf is ok, it looks like this:

Code:
search e2k.com.py
nameserver 200.85.32.2 (ISP DNS Server)
nameserver 200.85.32.3 (ISP DNS Server)
nameserver 127.0.0.1
Something I noticed is when I stop the iptables service the mails are sent, but when I start the iptables service again it doesnt work..

this is my iptables -L output:

Code:
Chain INPUT (policy DROP)
target prot opt source destination
ACCEPT icmp -- anywhere anywhere icmp echo-request
ACCEPT tcp -- 192.168.0.1 anywhere tcp dpt:ssh
ACCEPT tcp -- 192.168.0.1 anywhere tcp dpt:17190
ACCEPT tcp -- anywhere anywhere tcp dpt:domain
ACCEPT tcp -- anywhere anywhere tcp dpt:http
ACCEPT tcp -- anywhere anywhere tcp dpt:ftp
ACCEPT tcp -- anywhere anywhere tcp dpt:ftp
ACCEPT tcp -- anywhere anywhere tcp dpt:ftp-data
ACCEPT udp -- anywhere anywhere udp dpt:domain
ACCEPT tcp -- 216.55.240.44 anywhere tcp dpt:ssh
ACCEPT tcp -- anywhere anywhere tcp dptop3
ACCEPT tcp -- 172.16.128.62 anywhere tcp dpt:ssh
ACCEPT tcp -- anywhere anywhere tcp dpt:smtp

Chain FORWARD (policy DROP)
target prot opt source destination
ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
ACCEPT all -- anywhere anywhere

Chain OUTPUT (policy ACCEPT)
target prot opt source destination
what could be happening?