Table of Contents
The Messaging Server provides simple graphical administration using the Server Manager. This chapter describes:
We strongly recommend that you implement a backup procedure for your Messaging Server immediately.
For more information, see Chapter 2 “Configuration and Administration” and Chapter 3 “Mail Administration” in the Administrator's Guide.
The Messaging Server has a single administrative account named "admin". This is the name you use to log into the Server Manager for administering your messaging server. It is a valid mail account and can receive mail.
The admin account is managed like other user accounts as described in “Managing Mail Users”. You can also change the admin password by clicking on Admin Password under the System menu in the Server Manager.
Before proceeding with Messaging Server configuration, we recommend that you change the initial admin password, set by default to "admin." Neither the admin password nor any user password can be a null string. You must enter a string of at least one character; we recommend that you follow conventional password precautions as described in Chapter 8 “Changing Your Messaging Server Password”.
You must select and maintain passwords carefully to ensure the security of your Messaging Server. Insufficient password protection is a security risk.
In addition to the admin account, the Messaging Server provides a default postmaster mail alias. Postfix (as well as most other MTAs) require that an account for "postmaster" exists so that messages to the address "postmaster@host.domain" can be delivered successfully. It also receives any error messages generated by Postfix. The postmaster mail alias is created automatically during installation with the "admin" administrator account as its sole member. A postmaster alias is also created automatically in new domains. This alias should not be deleted from the domain.
The Server Manager is the principle Messaging Server administrative utility. It is a web-based management interface with support for all functions required to administer an office mail server, including the ability to:
Add/delete/modify virtual hosts, mail domains, mail users, and mail aliases.
Monitor mail services.
Control client user privileges (ACLs, Access Control Lists).
The Server Manager provides mail server administration screens accessible only by an administrator account with the login name "admin". By default, the Server Manager is served by the Apache webserver at:
https://hostname/msg
SSL (Secure Socket Layer) connections are enabled by default in the Messaging Server, allowing you to log in to the Server Manager immediately using an https URL. We strongly recommend that you use secure SSL connections provided by the https URL whenever possible.
Figure 4.1. The Server Manager Screen
The Server Manager screen includes menus for managing:
It also includes:
a Domain selection box.
a general HELP link that connects to the DocView online help system.
screen specific Help screens that connect to individual topics in the Administrator's Guide.
a LOGOUT button.
To protect Messaging Server security, we recommend that you log out of the Server Manager, rather than simply closing the browser window, whenever you are not actively using the Server Manager.
To administer domains with the Server Manager, click on these buttons in the Domains menu:
List the mail domains controlled by the Messaging Server.
Enter a mail domain name and description.
Delete the domain names you select.
To change domain names, including the primary domain, use the msgdomainmove(8) utility. For more information, see the msgdomainmove(8) manual page.
The Messaging Server supports multiple mail domains, with user and alias lists displayed in per-domain views. To switch to a different domain, select it from the Domain box in the upper right of the screen.
For information about managing virtual domains (multiple mail domains presented by the same mail server), see “Managing Mail Domains” in the Administrator's Guide.
You can use the Server Manager to create and modify mail accounts for users who receive mail on the Messaging Server. In the Users menu, click on:
Creates a new user. Required entries are marked with an asterisk (*):
*User ID; an identification name for the user which is unique for all domains in your entire Messaging Server installation.
First Name
Last Name
*Mail address
*Password
Calendar Node (if Steltor CorporateTime Server is installed).
The following optional information can also be entered by the admin user when the account is created or updated later by the client user (on some browsers, these options are displayed when you click on More):
Work Phone
Mobile Phone
Home Phone
Pager
FAX
Title
Office Location
Alternate Mail (Only the admin user can modify this field, client users cannot do so.)
Forward Mail To:
When you have entered all required and optional information, click on Create to enter the new user account information.
Lists all users in the selected mail domain, sorted by User ID. Clicking on the User ID link displays the user's complete account information. From this display you can take these User Actions:
Modify the listed settings.
change the user's Password.
view and modify the user's mail Quota
view Aliases to which the user is subscribed.
Delete this user.
Clicking on Quota lists mail quota usage for all users, sorted by email address. Click on email address to set or modify the quota.
To set or modify the user's mail quota limit, click on View Users and
select a User ID and click on Quota, or
select the Quota view and click on an email address.
Quota limits apply to the user's entire mailstore, including inbox and folders. Enter a value in megabytes of disk space; enter NONE to remove the quota. For more information, see “Setting Mail Quotas” in the Administrator's Guide.
If Steltor CorporateTime Server is installed and multiple calendar nodes have been configured, you can also reassign users to different nodes from this screen.
Searches for a user in the selected mail domain. You can enter a full or partial word to be found in the User ID or any of the Name fields. Click on the User ID links in the search results to display user information and take User Actions.
Selects a User ID to delete. When you click on Select, all the associated user information is erased from the LDAP database. You can also delete users from the View Users display.
You can use the Server Manager to create and modify mail aliases. In the Aliases menu, click on:
Creates a new alias in the current domain. Required entries are marked with an asterisk (*):
*Alias (the alias name)
Description
*Owner (at least one owner is required, multiple owners are permitted and recommended)
Membership (whether users may add or remove members to or from the alias); the default is Open.
*Alias Members (at least one member is required)
If users have permission to create aliases (see “Managing System Services” below), they can also view and manage these fields. However, only the admin user can enable the following alias features (on some browsers, these options are displayed when you click on More):
The path of a file on the system to which mail to this alias will be appended.
A program through which to pipe a message sent to the alias.
When you have entered all required and optional information, click on Create to enter the new alias information.
Lists all aliases in the selected mail domain, sorted by Alias. Clicking on the Alias link displays the complete alias information. From this display you can take these Alias Actions:
Modify the settings listed
add or remove alias Members
add or remove alias Owners
specify Programs/Files for the alias
Delete this alias
Searches for an alias in the selected mail domain. You can enter a full or partial word to be found in the Alias or Name fields. Click on the Alias links in the search results to display alias information and take Alias Actions.
Selects an Alias to delete. You can also delete users from the View Aliases display.
We recommend that every alias have at least two owners, and that important aliases also include the admin user as an owner or member.
Use the selections in the Server Manager System menu to control general Messaging Server system services:
Enter and confirm the new admin password value, then click on Apply to complete the change.
You can grant or deny these global access privileges for users in all mail domains controlled by the Messaging Server:
User Profile Privileges:
Users can change their own password
Users can change their own profile
Users can change their own mail forward address
Users can change their own vacation notice
Users can change their own junk mail settings
User Alias Privileges:
Users can create mail aliases
Users can add aliases as members of an alias
Users can add remote members to aliases
The default for all these settings is Yes.
When you change these settings, Preferences Manager screens for users currently logged in are not changed dynamically. We recommend that you alert Messaging Server users when global or individual changes are made to their privileges.
The Server Manager allows you to view the status and perform certain actions on the Messaging Server component servers:
cyrus - IMAP/POP Server
docview - OpenLinux Documentation Server
ldap - OpenLDAP Directory Server
postfix - Mail Transport Agent (MTA)
steltor_cts - Steltor CorporateTime Server (appears only if installed)
The Server Manager allows you to control access to the Realtime Blackhole List (RBL) mail filtering service. Click on:
to enable RBL service
to disable RBL service
Then click on Apply to complete the change.
RBL is a subsciption service that must be contracted before mail is filtered. For more information, see “Junk Mail Filtering”.
Most routine Messaging Server administration can be performed using the Server Manager interface. Nonetheless, there are a number of advanced tasks that must be performed from the command line or other interfaces, as documented in the Administrator's Guide.
In addition to the topics in this chapter, we recommend that you consult the Messaging Server Late News document, which is updated regularly on the Caldera website:
Many of the functions available from the Server Manager can be performed at the command line; for example, adding multiple users with the msgusercreate(8) command. See “Administrative Interfaces” in the Administrator's Guide.
You can import user data from other systems; for example, using the msgusermigrate(8) command to convert a UNIX system /etc/password file into an LDAP datastore. See “Importing User Data” in the Administrator's Guide.
The Messaging Server is compatible with the Volution Manager and Volution Online system management and administration products. They can be used to facilitate remote administration, software distribution and maintenance, and system monitoring. See “Using Volution System Management Services” in the Administrator's Guide.
Although the Messaging Server ships with reasonable default settings for its principle LDAP, Postfix, and Cyrus components, each can be customized. See the individual component documentation listed on the DocView Messaging Server home page.
Certain default parameters of these components cannot be changed without disabling your Messaging Server installation. See Chapter 6 “Managing Messaging Server Components” in the Administrator's Guide for a list of these parameters.
You can perform disaster recovery on user mailboxes with Cyrus utilities. See “Mail Directory Recovery ” in the Administrator's Guide.
The Messaging Server provides simple integration with commercial anti-virus software, and it supports Postfix component configuration for mail filtering. See “Avoiding Viruses” in the Administrator's Guide.
The Server Manager can be used to create virtual domains (multiple mail domains presented by the same mail server). See “Managing Mail Domains” in the Administrator's Guide.
While the Messaging Server provides SSL (Secure Socket Layer) configuration by default using demonstration keys, many SSL benefits are not available without a signed certificate and key. See “Enabling SSL” in the Administrator's Guide.