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Local mail system configuration

Without mail forwarding, root mails are delivered to root@fi.muni.cz (or mails in general to 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 (eg Postfix, Exim).

Mail system configuration

When configuring the Postfix mail system, you must edit the file 

# vi /etc/postfix/main.cf

and add a row 

relayhost = [relay.fi.muni.cz]

and then run the command 

# postfix reload

Mail redirection for root

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. You must be logged in as to create / edit aliases root . 

# vi /etc/aliases
To redirect mail to users root add a line 
root: login@fi.muni.cz

You must run the command after each change in the file 

# newaliases

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

Hostname setting

Make sure you have the correct hostname set, including the domain: 

$ hostname
vasstroj.fi.muni.cz

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

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

Redirection of emails generated by the command sudo

For forwarding shape emails *** SECURITY information for XY.fi.muni.cz *** to an address other than the default setting, add it with the command visudo to a new file /etc/sudoers.d/mailto line 

Defaults mailto = adresa

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

Redirecting emails from cron

To redirect emails from cron, you must add a line to the file from which tasks are run before the task definitions 

MAILTO=login@fi.muni.cz

Problem solving

If you encounter problems with the configuration, you may find the mail system logs, usually located in /var/log/mail* , /var/log/postfix or /var/log/exim*/ . Use the command to find out the contents of the local mail queue mailq . If you come across something you can't handle, we'll advise you at unix@fi.muni.cz .