Configure the local mail system

Without mail forwarding, root mails are delivered to root@fi.muni.cz (or generally mails for users login arrives at login@fi.muni.cz ). To redirect you need to create an alias and properly configure a mail system that supports aliases (such as Postfix, Exim).

Mail system configuration

When configuring the Postfix mail system, you need to edit the file

# vi /etc/postfix/main.cf

and add a line

relayhost = [relay.fi.muni.cz]

and then run the command

# postfix reload

Root mail forwarding

Aliases are stored in a file /etc/aliases (resp. /etc/mail/aliases ). The location of the file depends on the mail system you are using. To create / edit aliases, you must be logged in as root .

# vi /etc/aliases

root: login@fi.muni.cz

You must run a command after each change in the file

# newaliases

The command updates the alias database. For more information on aliases, see man 5 aliases .

Hostname Settings

Make sure you have the correct hostname, including domain:

$ hostname
vasstroj.fi.muni.cz

On systems with systemd you can set the hostname with the command hostnamectl :

# hostnamectl set-hostname vasstroj.fi.muni.cz

Redirecting mail generated by the command sudo

To redirect mail to shape *** SECURITY information for XY.fi.muni.cz *** to a different address than the default, add a command visudo to a new file /etc/sudoers.d/mailto line

Defaults mailto = adresa

But check that /etc/sudoers contains a row #includedir /etc/sudoers.d . Alternatively, you can edit directly /etc/sudoers .

Redirect cron mails

To redirect cron mails, you need to add a line to the file from which the tasks start up before the task definition

MAILTO=login@fi.muni.cz

Problem solving

If you encounter problems during configuration, the logs of the mail system, usually located in the /var/log/mail* , /var/log/postfix or /var/log/exim*/ . To find the contents of the local mail queue, use the command mailq . If you encounter something you don't know, we'll advise you on unix@fi.muni.cz .