Managing alias domains

An alias domain is an alias for a domain that was previously added with the subcommand domainadd. All accounts, aliases and relocated users from the domain will be also available in the alias domain.
In the following is to be assumed that example.net is an alias for example.com.

Postfix will not accept erroneously e-mails for unknown.user@example.net and bounce them back later to the mostly faked sender. Postfix will immediately reject all e-mails addressed to nonexistent users.

• This behavior is ensured, as long as the recommended database queries in the configurations are used.

An excerpt from the mail log as example:

Dec 26 06:45:19 hostname postfix/smtpd[22770]: connect from host.dom.tld[10.1.2.3]
Dec 26 06:45:19 hostname postfix/smtpd[22770]: 76F333CE155: client=host.dom.tld[10.1.2.3]
Dec 26 06:45:19 hostname postfix/smtpd[22770]: 76F333CE155: reject: RCPT from host.dom.tld[10.1.2.3]: 550 5.1.1 <unknown.user@example.net>: Recipient address rejected: User unknown; from=<sender@dom.tld> to=<unknown.user@example.net> proto=ESMTP helo=<host.dom.tld>
Dec 26 06:45:19 hostname postfix/cleanup[22788]: 76F333CE155: message-id=<20081226064511.B64C465C8@host.dom.tld>
Dec 26 06:45:19 hostname postfix/qmgr[22742]: 76F333CE155: from=<sender@dom.tld>, size=595, nrcpt=1 (queue active)
Dec 26 06:45:19 hostname postfix/smtpd[22770]: disconnect from host.dom.tld[10.1.2.3]
Dec 26 06:45:19 hostname deliver(a.user@example.net): msgid=<20081226064511.B64C465C8@host.dom.tld>: saved mail to INBOX
Dec 26 06:45:19 hostname postfix/pipe[22790]: 76F333CE155: to=<a.user@example.net>, relay=dovecot, delay=0.23, delays=0.21/0.01/0/0.01, dsn=2.0.0, status=sent (delivered via dovecot service)
Dec 26 06:45:19 hostname postfix/qmgr[22742]: 76F333CE155: removed

Adding an alias domain

Syntax:

• vmm aliasdomainadd aliasdomain targetdomain
  vmm ada aliasdomain targetdomain

This subcommand adds the new aliasdomain to the targetdomain that should be aliased.

Example:

hostname ~ # vmm aliasdomainadd example.net example.com
hostname ~ #

Alias domain information

Syntax:

• vmm aliasdomaininfo aliasdomain
  vmm adi aliasdomain

This subcommand shows to which domain the aliasdomain is assigned to.

Example:

hostname ~ # vmm aliasdomaininfo example.net
Alias domain information
------------------------
        The alias domain example.net belongs to:
            * example.com

hostname ~ #

Switching the target domain

Syntax:

• vmm aliasdomainswitch aliasdomain targetdomain
  vmm ads aliasdomain targetdomain

If the target of the existing aliasdomain should be switched to another targetdomain use this subcommand.

Example:

hostname ~ # vmm aliasdomainswitch example.net pаypal.tld
hostname ~ #

Deleting an alias domain

Syntax:

• vmm aliasdomaindelete aliasdomain
  vmm add aliasdomain

Use this subcommand if the alias domain aliasdomain should be removed.

Example:

hostname ~ # vmm aliasdomaindelete example.net
hostname ~ #