When the spam filter is disabled, all received email messages will go to the inbox folder of the logged in user.
The exception to this rule, are email messages with an extremely high spam score. These email messages are always rejected by Rspamd.
When the spam filter is enabled, received email messages will be moved to the logged in user's inbox folder or junk folder depending on the user defined spam filter tolerance.
The user defined spam filter tolerance determines when an email is classified as ham (moved to the inbox folder) or spam (moved to the junk folder).
The default value is 80%. The lower the spam filter tolerance, the more false positives (ham classified as spam). The higher the spam filter tolerance, the more false negatives (spam classified as ham).
Under the section `Auto-forward`, the automatic forwarding of received email messages can be enabled. When enabled, all received email messages are forwarded to the specified email address.
The option "Keep a copy of the emails" can be ticked, to keep a copy of the received email message in the inbox folder.
In the destination textbox, the email addresses can be entered for automatic forwarding. When entering multiple email addresses the comma (',') must be used as delimiter.
Under Reply subject the email subject for automatic replies can be configured. When a reply subject is entered, this subject will be used for the automatic reply.
When no reply subject is entered, the automatic reply will have the subject `auto: <subject from received email>`.
E.g. if the email subject of the received email message is "how are you?", then the email subject of the automatic reply is `auto: how are you?`.
For more information on changing the polling interval see :ref:`the configuration reference <fetchmail>`.
You can add a fetched account by clicking on the `Add an account` button on the top right of the page. To add an fetched account, the following settings must be configured:
* Protocol (IMAP or POP3). The protocol used for accessing the email server.
* Hostname or IP. The hostname or IP address of the email server.
* TCP port. The TCP port the email server listens on. Common ports are 993 (IMAPS with TLS), 143 (IMAP with STARTTLS), 995 (POP3S with TLS) or 110 (POP3 with STARTTLS).
Click the submit button to apply settings. With the default polling interval, fetchmail will start polling the email account after ``FETCHMAIL_DELAY``.
The purpose of an authentication token is to create a unique and strong password that can be used by a single application to authenticate as the logged in user's email account.
The application will use this authentication token instead of the logged in user's password for sending/receiving email.
This allows safe access to the logged in user's email account. At any moment, the authentication token can be deleted so that the application has no access to the logged in user's email account anymore.
By clicking on the New token button on the top right of the page, a new authentication token can be created. On this page the generated authentication token will only be displayed once.
After saving the application token it is not possible anymore to view the unique password.
The comment field can be used to enter a description for the authentication token. For example the name of the application the application token is created for.
In the Authorized IP field a comma separated list of white listed IP addresses or networks can be entered. When the field is set, the application token can only be used when the IP address of the client matches what is in the field.
When no IP address is entered, there is no restriction on IP address.
On the `announcement` page, the global administrator can send an email message to all email accounts on the Mailu server. This message will be received as an email message in the inbox folder of each user on the Mailu server.
On the announcement page there are the following options:
* Announcement subject. The subject of the announcement email message.
* Announcement body. The body of the announcement email message.
Click on send to send the announcement email message to all users.
Administrators
--------------
On the `administrators` page, global administrators can be added. A global administrator must be an existing user on the Mailu server.
A global administrator can change `any setting` in the admin GUI. Be careful that you trust the user who you make a global administrator.
On the `relayed domains list` page, destination domains can be added that Mailu will relay email messages for without authentication.
This means that for these destination domains, other email clients or email servers can send email via Mailu unauthenticated via port 25 to this destination domain.
For example if the destination domain example.com is added. Any emails to example.com (john@example.com) will be relayed to example.com.
* Relayed domain name. The domain name that is relayed. Email messages addressed to this domain (To: John@example.com), will be forwarded to this domain.
The menu item Antispam opens the Rspamd webgui. For more information how spam filtering works in Mailu see the :ref:`Spam filtering page <antispam_howto_block>`.
The Rspamd webgui offers basic functions for setting metric actions, scores, viewing statistics and learning.
The following settings are not persisent and are *lost* when the Antispam container is recreated or restarted:
* On the configuration tab, any changes to config files that do not reside in /var/lib or /etc/rspamd/override.d. The last location is mapped to the Mailu overrides folder.
* All information on the History tab.
The following settings are persistent and will survive container recreation:
* All information on the Status tab
* All information on the Throughput tab.
* On the Configuration tab, the changes made to action values (greylist, probably spam ....) and config files that reside in /var/lib or /etc/rspamd/override.d. The last location is mapped to the Mailu overrides folder.
* Any changes made on the Symbols tab.
* Any email messages that have been submitted for spam/ham learning on the Scan/Learn tab.
On the `Mail domains` page all the domains served by Mailu are configured. Via the new domain button (top right) a new mail domain can be added. Please note that you may have to add the new domain to `HOSTNAMES` in your :ref:`mailu.env file <common_cfg>`. For existing domains you can access settings via the icons in the Actions column and Manage column. From left to right you have the following options within the Action column and Manage column.
This page is also accessible for domain managers. On the details page all DNS settings are displayed for configuring your DNS server. It contains information on what to configure as MX record and SPF record. On this page it is also possible to (re-)generate the keys for DKIM and DMARC. The option for generating keys for DKIM and DMARC is only available for global administrators. After generating the keys for DKIM and DMARC, this page will also show the DNS records for configuring the DKIM/DMARC records on the DNS server.
* Maximum user count. The maximum amount of users that can be created under this domain. Once this limit is reached it is not possible anymore to add users to the domain; and it is also not possible for users to self-register.
* Maximum user quota. The maximum amount of quota that can be assigned to a user. When creating or editing a user, this sets the limit on the maximum amount of quota that can be assigned to the user.
* Enable sign-up. When this option is ticked, self-registration is enabled. When the Admin GUI is accessed, in the menu list the option Signup becomes available.
Obviously this menu item is only visible when signed out. On the Signup page a user can create an email account.
If your Admin GUI is available to the public internet, this means your Mailu installation basically becomes a free email provider.
This page is only accessible for global administrators. This page allows you to delete the domain. The Admin GUI will ask for confirmation if the domain must be really deleted.
This page is also accessible for domain managers. On the users page new users can be added via the Add user button (top right of page). For existing users the following options are available via the columns Actions and User settings (from left to right)
* Edit. For all available options see :ref:`the Add user page <webadministration_add_user>`.
* Auto-reply. Access the auto-reply page of the user. See the :ref:`auto-reply page <webadministration_auto-reply>` for more information.
* Fetched accounts. Access the fetched accounts page of the user. See the :ref:`fetched accounts page <webadministration_fetched_accounts>` for more information.
* Enabled. Tick this checkbox to enable the user account. When an user is disabled, the user is unable to login to the Admin GUI or webmail or access his email via IMAP/POP3 or send mail.
This page is also accessible for domain managers. On the aliases page, aliases can be added for email addresses. An alias is a way to disguise another email address.
* a__% - Finds any values that start with "a" and are at least 3 characters in length
* a%o - Finds any values that start with "a" and ends with "o"
* Destination. The destination email address for the alias. Click in the Destination text box to access a drop down list where you can select a destination email address.
* Comment. A description for the alias. This description is visible on the Alias list page.
then email send to user@mymail.com will end up in the email box of user@example.com.
New domain
`````````````````
This page is only accessible for global administrators. Via this page a new domain can be added to Mailu. The following options must be defined for adding a domain:
* domain name. The name of the domain.
* Maximum user count. The maximum amount of users that can be created under this domain. Once this limit is reached it is not possible anymore to add users to the domain; and it is also not possible for users to self-register.
* Maximum user quota. The maximum amount of quota that can be assigned to a user. When creating or editing a user, this sets the limit on the maximum amount of quota that can be assigned to the user.
* Enable sign-up. When this option is ticked, self-registration is enabled. When the Admin GUI is accessed, in the menu list the option Signup becomes available.
Obviously this menu item is only visible when signed out. On the Signup page a user can create an email account.
If your Admin GUI is available to the public internet, this means your Mailu installation basically becomes a free email provider.
* Comment. Description for the domain. This description is visible on the parent domains list page.
Webmail
-------
The menu item `Webmail` opens the webmail page. This option is only available if the webmail container is running and is enabled in the mailu.env file.
