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`virtusertable` — Specifies a domain-specific form of aliasing, allowing multiple virtual domains to be hosted on one machine.
Several of the configuration files in the `/etc/mail/` directory, such as `access`, `domaintable`, `mailertable` and `virtusertable`, must actually store their information in database files before Sendmail can use any configuration changes. To include any changes made to these configurations in their database files, run the following commands, as `root`:
~]#{nbsp}cd /etc/mail/
~]#{nbsp}make all
This will update `virtusertable.db`, `access.db`, `domaintable.db`, `mailertable.db`, `sendmail.cf`, and `submit.cf`.
To update all the database files listed above and to update a custom database file, use a command in the following format:
[command]#make _name.db_ all#
where _name_ represents the name of the custom database file to be updated.
To update a single database, use a command in the following format:
[command]#make _name.db_pass:attributes[{blank}]#
where _name.db_ represents the name of the database file to be updated.
You may also restart the `sendmail` service for the changes to take effect by running:
~]#{nbsp}systemctl restart sendmail
For example, to have all emails addressed to the `example.com` domain delivered to `bob@other-example.com`, add the following line to the `virtusertable` file:
[command]#@example.com bob@other-example.com#
To finalize the change, the `virtusertable.db` file must be updated:
~]#{nbsp}make virtusertable.db all
Using the [option]`all` option will result in the `virtusertable.db` and `access.db` being updated at the same time.
Common Sendmail Configuration Changes
indexterm:[Sendmail,common configuration changes]indexterm:[Sendmail,with UUCP] When altering the Sendmail configuration file, it is best not to edit an existing file, but to generate an entirely new `/etc/mail/sendmail.cf` file.
Backup the sendmail.cf file before changing its content
Before replacing or making any changes to the `sendmail.cf` file, create a backup copy.
To add the desired functionality to Sendmail, edit the `/etc/mail/sendmail.mc` file as `root`. Once you are finished, restart the `sendmail` service and, if the [package]*m4* package is installed, the [command]#m4# macro processor will automatically generate a new `sendmail.cf` configuration file:
Configuring Sendmail as a server for other clients
The default `sendmail.cf` file does not allow Sendmail to accept network connections from any host other than the local computer. To configure Sendmail as a server for other clients, edit the `/etc/mail/sendmail.mc` file, and either change the address specified in the [command]#Addr=# option of the [command]#DAEMON_OPTIONS# directive from [command]#127.0.0.1# to the IP address of an active network device or comment out the [command]#DAEMON_OPTIONS# directive all together by placing [command]#dnl# at the beginning of the line. When finished, regenerate `/etc/mail/sendmail.cf` by restarting the service:
The default configuration in {MAJOROS} works for most `SMTP`-only sites. However, it does not work for _UUCP_ (_UNIX-to-UNIX Copy Protocol_) sites. If using UUCP mail transfers, the `/etc/mail/sendmail.mc` file must be reconfigured and a new `/etc/mail/sendmail.cf` file must be generated.
Consult the `/usr/share/sendmail-cf/README` file before editing any files in the directories under the `/usr/share/sendmail-cf/` directory, as they can affect the future configuration of the `/etc/mail/sendmail.cf` file.
Masquerading
indexterm:[Sendmail,aliases]indexterm:[Sendmail,masquerading] One common Sendmail configuration is to have a single machine act as a mail gateway for all machines on the network. For example, a company may want to have a machine called `mail.example.com` that handles all of their email and assigns a consistent return address to all outgoing mail.
In this situation, the Sendmail server must masquerade the machine names on the company network so that their return address is `user@example.com` instead of `user@host.example.com`.
To do this, add the following lines to `/etc/mail/sendmail.mc`:
FEATURE(always_add_domain)dnl
FEATURE(`masquerade_entire_domain')dnl
FEATURE(`masquerade_envelope')dnl
FEATURE(`allmasquerade')dnl
MASQUERADE_AS(`example.com.')dnl
MASQUERADE_DOMAIN(`example.com.')dnl
MASQUERADE_AS(example.com)dnl

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String updated in the repository

  1. fedora-docs-l10n/fedora-system-administrat
  2. f37/pages/servers/Mail_Servers
  3. English
~]#{nbsp}make virtusertable.db all
~]#{nbsp}make virtusertable.db all
a year ago
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Source string description
type: delimited block -
Flags
no-wrap, read-only
Source string location
./pages/servers/Mail_Servers.adoc:421
String age
a year ago
Last updated
10 months ago
Source string age
a year ago
Translation file
pot/f37/pages/servers/Mail_Servers.pot, string 157