Unable to send emails to mail list: Recipient address rejected: User unknown in virtual mailbox table

Created:

2017-03-18 06:49:18 UTC

Modified:

2017-08-08 13:25:18 UTC

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Unable to send emails to mail list: Recipient address rejected: User unknown in virtual mailbox table

Symptoms

Unable to send emails to mailing list, following error can be found in /var/log/maillog:

Mar 18 05:35:29 server_name postfix/smtpd[9962]: NOQUEUE: reject: RCPT from some_mail_server[203.0.113.2]: 550 5.1.1 <maillist@example.com>: Recipient address rejected: User unknown in virtual mailbox table; from=<sendler@somedomain.com> to=<maillist@example.com proto=ESMTP helo=<some_mail_server>

Cause

/var/spool/postfix/plesk/virtual doesn't contain mail-list address.

Resolution

Switch off/on maillist at:

Plesk > Domains > example.com > Email Addresses > Mailing Lists > maillist@example.com

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