Configuration of the local mail system

Without mail forwarding, mails intended for root are delivered to the address root@fi.muni.cz (or emails for users in general login arrive at login@fi.muni.cz ). For redirection, you need to create an alias and correctly configure a mail system that supports aliases (e.g. Postfix, Exim).

Mail system configuration

When configuring the Postfix mail system, it is necessary 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

Mail forwarding

Aliases are stored in a file /etc/aliases (or /etc/mail/aliases ). The location of the file depends on the mail system used. You must be logged in as to create/edit aliases root .

# vi /etc/aliases

root: login@fi.muni.cz

Forward your mail for your checking account anyway. The command must be run after each change in the file

# newaliases

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

Setting hostname

Check that you have the correct hostname set including the domain:

$ hostname
vasstroj.fi.muni.cz

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

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

Forwarding of emails generated by the command sudo

To redirect form mails *** SECURITY information for XY.fi.muni.cz *** to an address other than the one set by default, add using 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 .

Forwarding emails from cron

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

MAILTO=login@fi.muni.cz

Problem solving

If you encounter problems during configuration, you may find the mail system logs, usually located in the /var/log/mail* , /var/log/postfix or /var/log/exim*/ . You can find out the contents of the local mail queue with the command mailq . If you encounter something that you do not know how to deal with, we will advise you on unix@fi.muni.cz .