概要: On Plesk for Linux servers using the Postfix or qmail mail servers, for every hosted domain, a number of mail aliases are automatically created. The aliases have names such as 「root@<domain.name>」, 「postmaster@<domain.name>」, 「anonymous@<domain.name>」, and so on. These are the so-called 「reserved mailbox names」.

By default, any mail sent to one of these aliases is forwarded to the Plesk administrator’s email address. Spammers may take advantage of this behavior. To counteract this, it is possible to only leave certain mail aliases active, or to disable all mail aliases altogether.

In this topic, you will learn how to specify which mail aliases may forward mail to the Plesk administrator’s email address.

Prerequisites and Limitations

This topic is only applicable to Plesk for Linux servers, and only if a local Postfix or qmail mail server is handling mail for the Plesk server.

Disabling Default Mail Aliases

Disabling the default mail aliases is done by configuring the list of mail aliases allowed to forward mail to the Plesk administrator’s email address. To disable one or more default mail aliases, you need to omit them from the list. To disable all of them, you need to leave the list empty.

To configure the list of allowed mail aliases:

  1. Add the following lines to the panel.ini file:

    [mail]
adminAliases = alias1 alias2 .. aliasN

    For example, to only allow mail sent to the root and postmaster aliases to be forwarded to the Plesk administrator’s email address, add the following:

    [mail]
adminAliases = root postmaster

    To prevent mail sent to any of the default mail aliases from being forwarded to the Plesk administrator’s email address, add the following:

    [mail]
adminAliases =

  2. Log in to the Plesk server via SSH as the root user.

  3. 運行以下命令：

    plesk repair mail -y

The list of mail aliases allowed to forward mail to the Plesk administrator’s email address is now updated. Mail sent to any mail alias not listed in the panel.ini file will be rejected.

mail from: aliastest@example.com
250 2.1.0 Ok
rcpt to: root@example.com
550 5.1.1 <root@example.com>: Recipient address rejected: User unknown in virtual mailbox table