In case you need to make Postfix look in your local /etc/hosts files before doing DNS lookup add following in main.cf file:
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lmtp_host_lookup = native smtp_host_lookup=native |
Don’t forget to restart Postfix:
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service postfix restart |
Now you send test letter:
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echo Hi there, how are you? | mail -s "test mail" root |
And check /var/log/maillog to make sure Postfix gets IP from /etc/hosts file.
Good luck!
