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how_to_make_the_mail_command_work [2010/12/03 23:25] (current)
tkbletsc created
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 +====== Command line email ======
  
 +The '​mail'​ command is used to check system-local email (not Internet email) and to send email from the command line.  It can be used in scripts to send status messages and alerts to your email address. ​ For example, you could send yourself email with this one-liner:
 +
 +echo MESSAGE BODY | mail MYSELF@ncsu.edu -s "​SUBJECT LINE"
 +
 +Unfortunately,​ though, it's not configured to work with Internet email out-of-box on many Linux systems. ​ Here are the quick steps to enabling it:
 +
 +===== Ubuntu =====
 +
 +On Ubuntu 7.04 and some later versions (not sure up to what), do ''​apt-get install mailx''​. ​ Starting around 10.04, the package name changes, so do ''​apt-get install mailutils''​.
 +
 +Next, configure for Internet sending:
 +
 +<​file>​
 +$ sudo dpkg-reconfigure exim4-config
 +</​file>​
 +
 +In the menu, select:
 +  * General type of mail configuration:​ ''​internet site; mail is sent and received directly using SMTP''​
 +  * System mail name: Accept the default, which should be the FQDN (e.g. ''​davros.csc.ncsu.edu''​)
 +  * IP-addresses to listen on for incoming SMTP connections:​ ''​127.0.0.1''​ (default)
 +  * Other destinations for which mail is accepted: (either blank or the FQDN)
 +  * //Use the defaults for the rest of the questions//
 +
 +Note that because the mail server is set to listen only on 127.0.0.1, this will //not// open the SMTP server up to internet traffic (and the security concerns that brings).  ​
 +
 +===== CentOS / Fedora / RHEL =====
 +
 +This has been tested on CentOS 5.3, but will likely work elsewhere. ​ We'll just install ''​postfix''​ and a little admin tool to enable it:
 +
 +<​file>​
 +$ sudo yum install postfix system-switch-mail
 +...
 +Is this ok [y/N]: y
 +...
 +</​file>​
 +
 +Then enable postfix:
 +
 +<​file>​
 +$ sudo system-switch-mail
 +</​file>​
 +
 +Select ''​postfix''​ from the menu.
 +
 +Note that because the mail server is set to listen only on 127.0.0.1 by default, this will //not// open the SMTP server up to internet traffic (and the security concerns that brings).  ​
 +
 +===== Troubleshooting =====
 +
 +If your email doesn'​t go through, run '​mail'​ alone to check your local Unix-type mail.  If there are messages, view them with '​p'​ and observe the error message. ​ If there'​s nothing, check the log files in /var/log.
how_to_make_the_mail_command_work.txt ยท Last modified: 2010/12/03 23:25 by tkbletsc