Postfix/aliasing - Revision history

Woozle at 20:52, 9 August 2021

2021-08-09T20:52:16Z

← Older revision		Revision as of 20:52, 9 August 2021
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	===config files===		===config files===
	* {{l/fn/abs\|etc/aliases}}		* {{l/fn/abs\|etc/aliases}}
			* {{l/fn/abs\|etc/postfix/virtual}}
	===user aliases===		===user aliases===
	To set up aliases, either edit the file specified by the {{l/same\|pfx=main.cf/\|alias_maps}} setting in {{l/same\|main.cf}} ([[etc/aliases\|/etc/aliases]] by default) and then run [[newaliases]] (or <code>postalias {{arg\|alias file}}</code>, e.g. <code>postalias /etc/aliases</code>) to update the database, or else use [[Webmin]] (Servers → Postfix Mail Server → "Mail Aliases" icon → "Create a new alias" link).		To set up aliases, either edit the file specified by the {{l/same\|pfx=main.cf/\|alias_maps}} setting in {{l/same\|main.cf}} ([[etc/aliases\|/etc/aliases]] by default) and then run [[newaliases]] (or <code>postalias {{arg\|alias file}}</code>, e.g. <code>postalias /etc/aliases</code>) to update the database, or else use [[Webmin]] (Servers → Postfix Mail Server → "Mail Aliases" icon → "Create a new alias" link).

Woozle at 20:44, 9 August 2021

2021-08-09T20:44:21Z

← Older revision		Revision as of 20:44, 9 August 2021
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			===config files===
			* {{l/fn/abs\|etc/aliases}}
	===user aliases===		===user aliases===
	To set up aliases, either edit the file specified by the {{l/same\|pfx=main.cf/\|alias_maps}} setting in {{l/same\|main.cf}} ([[etc/aliases\|/etc/aliases]] by default) and then run [[newaliases]] (or <code>postalias /etc/aliases</code>) to update the database, or else use [[Webmin]] (Servers → Postfix Mail Server → "Mail Aliases" icon → "Create a new alias" link).		To set up aliases, either edit the file specified by the {{l/same\|pfx=main.cf/\|alias_maps}} setting in {{l/same\|main.cf}} ([[etc/aliases\|/etc/aliases]] by default) and then run [[newaliases]] (or <code>postalias {{arg\|alias file}}</code>, e.g. <code>postalias /etc/aliases</code>) to update the database, or else use [[Webmin]] (Servers → Postfix Mail Server → "Mail Aliases" icon → "Create a new alias" link).

	There is also a <code>/etc/postfix/virtual</code> file for aliases in virtual domains; it can be edited manually, but you need to run <code>postmap /etc/postfix/virtual</code> after modifying it.		There is also a <code>/etc/postfix/virtual</code> file for aliases in virtual domains; it can be edited manually, but you need to run <code>postmap /etc/postfix/virtual</code> after modifying it.

	~~'''Notes''':~~
	* Webmin seems to automatically run newaliases when you add or modify an individual alias, but ''not'' when you use it to edit the [[etc/aliases\|/etc/aliases]] file directly. Changes made to /etc/aliases will not take effect until the database is updated.
	* Stopping and starting the postfix daemon does ''not'' update from the aliases file; you still have to run newaliases.
	* see [http://www.postfix.org/aliases.5.html aliases] for more information.
	===virtual users===		===virtual users===
	By default, virtual aliases seem to get looked up only when email comes from the outside; locally generated emails are "returned" as undeliverable with the error message "Diagnostic-Code: x-unix; user unknown"		By default, virtual aliases seem to get looked up only when email comes from the outside; locally generated emails are "returned" as undeliverable with the error message "Diagnostic-Code: x-unix; user unknown"

Woozle: /* catch-all */

2021-08-09T14:45:02Z

catch-all

← Older revision		Revision as of 14:45, 9 August 2021
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	* {{l/same\|pfx=main.cf/\|luser_relay}} = {{arg\|whereToSend}}		* {{l/same\|pfx=main.cf/\|luser_relay}} = {{arg\|whereToSend}}

	The syntax for ~~<u>~~whereToSend~~</u>~~ is explained [http://www.postfix.org/postconf.5.html#luser_relay here].		The syntax for {{arg\|whereToSend}} is explained [http://www.postfix.org/postconf.5.html#luser_relay here].

	'''Examples:'''		'''Examples:'''

Woozle: Woozle moved page Postfix/aliases to Postfix/aliasing without leaving a redirect: so as not to conflict with the "aliases" internal app page (not yet written)

2021-08-09T14:42:27Z

Woozle moved page Postfix/aliases to Postfix/aliasing without leaving a redirect: so as not to conflict with the "aliases" internal app page (not yet written)

← Older revision	Revision as of 14:42, 9 August 2021
(No difference)

Woozle: tidying

2021-08-09T14:41:05Z

tidying

New page

===user aliases===
To set up aliases, either edit the file specified by the {{l/same|pfx=main.cf/|alias_maps}} setting in {{l/same|main.cf}} ([[etc/aliases|/etc/aliases]] by default) and then run [[newaliases]] (or <code>postalias /etc/aliases</code>) to update the database, or else use [[Webmin]] (Servers → Postfix Mail Server → "Mail Aliases" icon → "Create a new alias" link).

There is also a <code>/etc/postfix/virtual</code> file for aliases in virtual domains; it can be edited manually, but you need to run <code>postmap /etc/postfix/virtual</code> after modifying it.

'''Notes''':
* Webmin seems to automatically run newaliases when you add or modify an individual alias, but ''not'' when you use it to edit the [[etc/aliases|/etc/aliases]] file directly. Changes made to /etc/aliases will not take effect until the database is updated.
* Stopping and starting the postfix daemon does ''not'' update from the aliases file; you still have to run newaliases.
* see [http://www.postfix.org/aliases.5.html aliases] for more information.
===virtual users===
By default, virtual aliases seem to get looked up only when email comes from the outside; locally generated emails are "returned" as undeliverable with the error message "Diagnostic-Code: x-unix; user unknown"

The following change in {{l/same|main.cf}} solves that problem –
* '''change''': {{l/same|pfx=main.cf/|receive_override_options}} = no_address_mappings
* '''to this''': receive_override_options =
– but creates a new one, in that externally-sourced messages are now delivered ''twice'' (or ''four'' times if addressed directly to a virtual user instead of a virtual alias).

Someone who understands the internal structure of postfix could probably figure out what this means (and how to fix it), but I'm still working on it.

===catch-all===
To set up a catch-all address, edit {{l/same|main.cf}} and set the following parameters:
* {{l/same|pfx=main.cf/|local_recipient_maps}} =
* {{l/same|pfx=main.cf/|luser_relay}} = {{arg|whereToSend}}

The syntax for <u>whereToSend</u> is explained [http://www.postfix.org/postconf.5.html#luser_relay here].

'''Examples:'''
* <code>luser_relay = $user@anotherdomain.org</code>
** forwards all email addressed to "invaliduser@firstdomain.org" to "invaliduser@anotherdomain.org"
* <code>luser_relay = youraccount@anotherdomain.org</code>
** forwards all email addressed to invalid users to "youraccount@anotherdomain.org".

[http://www.cyberciti.biz/faq/howto-setup-postfix-catch-all-email-accounts/ This page] mentions some other parameters but neglects the ones above.