====== Emails ======
This article describes how to configure the Eden cluster servers to send email notifications.

1. Remove all unnecessary interfering packages:

  apt purge postfix* exim* mailutils* sendmail*
  apt autoremove

2. Install the MTA (Mail Transport Agent) program called ''msmtp'':

  apt install msmtp

3. Add the configuration file ''/etc/msmtprc'' and include the following content:

  defaults
  auth off
  tls off
  account default
  host poczta.mini.pw.edu.pl
  port 25
  from <HOST-NAME>@mini.pw.edu.pl
  logfile /var/log/msmtp

<WRAP center round important 60%>
Update the sending server's hostname!
</WRAP>

4. Link the ''msmtp'' program to the sendmail ''command'':

  ln -s /usr/bin/msmtp /usr/sbin/sendmail

5. Create the ''/var/log/msmtp'' file and set the permissions:

  touch /var/log/msmtp
  chown msmtp:root msmtp
  chmod 660 msmtp

6. Create a ''logrotate'' entry for the log file and save it to: ''/etc/logrotate.d/msmtp''

  /var/log/msmtp {
      daily
      rotate 7
      compress
      delaycompress
      missingok
      notifempty
      create 660 msmtp root
  }