Configure 'mail' command to send external email when '/etc/mailname' is used

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http://askubuntu.com – I have postfix and mail installed on my server. The following command works fine $mail [email protected] But if I use this command $mail [email protected] The system thinks I am trying to send a local email to the user 'aj'. How can set mail to send emails to [email protected] externally? The output from /etc/mailname is $cat /etc/mailname mydomain.com The output from /etc/mail.rc $cat /etc/mail.rc set ask askcc append dot save crt ignore Received Message-Id Resent-Message-Id Status Mail-From Return-Path Via Delivered-To (HowTos)