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What does “NIS domain name not set – NIS lookups disabled” mean?

April 26, 2017disabled domain name lookups mean NIS

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What does “NIS domain name not set – NIS lookups disabled” mean?

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The warning message means that NIS (Network Information Service) is not enabled on your machine. That is perfectly OK. It’s just hard for Postfix to find out about these things ahead of time. To disable the NIS client code in the Postfix local delivery agent, update the corresponding section in the main.cf file and specify one of the following, depending on the type of aliases file: /etc/postfix/main.cf: alias_maps = $alias_database This forces Postfix to use only the local aliases database, if one is defined. Postfix rejects mail with “User unknown in local recipient table” As of version Postfix 2.0, you are expected to tell the Postfix SMTP server what local users exist by listing all tables with local usernames or addresses in the local_recipient_maps parameter. To find out what Postfix version you have, execute the command postconf mail_version. The default local_recipient_maps setting assumes that you use the default Postfix local delivery agent: /etc/postfix/main.cf: local_recipi