Use this page to configure your mail server: set up black and white lists to control mail relaying from specific domains, define the limit on incoming e-mail message size, set up MAPS spam protection, and define the type of mail account names allowed on the server.
The White List is used to specify the IP addresses from which mail relay is allowed without authorization, even if the relaying is disabled on the server. To manage the white list, click White List.
The Black List is used to specify the domains from which you will not allow mail to be received. To manage the black list, click Black List.
To limit the allowed size of incoming e-mail messages, type the desired value into the Maximum letter size field. If this field is left blank, or zero entered, the allowed letter size will be unlimited.
The Relaying fields are used to set the mail system relay mode. Mail relaying can work in one of three modes: closed relay, relay with authorization and open relay.
Selecting closed will only allow mail to be sent and received locally (to and from domains residing on the server). The only exception would be hosts specified as allowed relay hosts in the White List.
Selecting authorization is required will allow any host computer to utilize the mail services of a domain on the server provided that a valid username and password are used to authenticate the mail user.
In the authorization required mode you can use the following authorization types:
Selecting open relay will allow any host computer to utilize the mail services of any domain on the server to send and/or receive mail. If you want to use this option, you will need to perform the following steps:
- Click the Server shortcut in the navigation pane, and then click the Interface Management icon in the Control panel group.
- Select the Show interface management toolbar check box and click OK. The toolbar will appear in the bottom right frame and you will return to the Server Administration screen.
- Click the Mail icon under the Services group.
- Click the Customize button on the toolbar to enable the customization mode. The ‘open’ radio button will appear in the Relaying group.
- Select the ‘open’ radio button, scroll to the bottom of the right frame and click OK.
- Close the toolbar by clicking the Hide toolbar shortcut. The toolbar will be closed and you will exit the customization mode. Plesk’s mail server will start operating in the open relay mode.
In order to ensure that the mailboxes passwords are not easy to guess, select the Check the passwords for mailboxes in the dictionary checkbox.
Select the Enable MAPS spam protection checkbox, to enable the mail abuse prevention system to help you defend your customers from abuse by spammers. Enter the DNS zone name (e.g. domain.com) in the MAPS zones field. You can specify several MAPS zones separated by semicolons.
Select the mail name format that you want to be used for the POP3/IMAP accounts. Two options are available: 1) use of both short (e.g. webmaster) and full (e.g. webmaster@domain.com) mail names, and 2) use of full mail names only.
Click OK to submit the settings.