postfix not sending to host

[mister_v]

Hello,

I used to use postfix to send mails directly to another server,
But since the last update it is not working anymore. The mails get bounced (on the sending server).

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relay=none, delay=4.2, delays=4.2/0.01/0.04/0, dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=SERVER

The SERVER is in the /etc/hosts file, ping works.
Why is it looking for DNS entry ?

[chris]

The default have changed,
Add these lines to your config, to tell to use /etc/hosts and not DNS

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lmtp_host_lookup = native
smtp_host_lookup = native