If a mail server receives a request to deliver a message to a non-existent user, then it will reply with a 5XX series error.
The e-mail client or downstream mail server attempting the send operation will receive this error and will generate a non-delivery message to the user.
The cause of the error is either that the user/mailbox does not exist (and has been specified incorrectly when the user sent the message) or that a server configuration problem is stopping the server from resolving the users e-mail address.
When sending messages through MailEnable the following error is returned in the client:
550 Requested action not taken: mailbox unavailable or not local
Mailbox/es are unable to send and receive.
This article only applies to servers running the Plesk Control Panel and can occur with all mailboxes on the system or only one/some.
The Plesk control system has the ability to disable mailboxes within its interface. To do this the panel edits the MailEnable configuration file (address-map.tab) and adds a ! into the mailbox address which makes the mailbox unrecognisable by the MailEnable services.
To verify this is the case, check in the MailEnable Administration program for a mailbox that is experiencing the issue and see if the mailbox is disabled. A mailbox that is disabled within MailEnable will have a red cross on the mailbox icon.
For more advanced users, or to verify if Plesk was the service that disabled the mailbox, open the following configuration file;
and search for any mailboxes that appear like the following entry:
[!SMTP:firstname.lastname@example.org] a normal mailbox would appear without the ! before the SMTP: part of the configuration string.
To resolve this issue, re-enable all the mailboxes within the Plesk control panel, or search through the address-map.tab file and remove all ! characters.
MailEnable response codes:http://www.mailenable.com/kb/viewarticle.asp?&SS=550&File=me020032.htm
Plesk Control Panel:http://www.swsoft.com
|Product:||MailEnable (All Versions)|
|Class:||HOWTO: Product Instructions|
|Revised:||Wednesday, October 26, 2016|