hey a got the same error when trying to send mails outgoing mi LAN:
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:
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 it doesnt work again..
ports 25 and 53 are enable in my firewall
what could be happening?
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