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Knowledge Base

Mail is not forwarded to destination address if forwarding source mail address has reached mailbox size limit and its mailbox was turned off subsequently

 
domainsemailmailmailboxplesk obsidian for linux

Symptoms

  • [email protected] is set up as forwarding destination mail address in Domains > example.com > Email Addresses > [email protected];
  • [email protected] has reached its mailbox size limit;
  • Mailbox for mail address [email protected] was turned off in Domains > example.com > Email Addresses > [email protected];
  • After that mail is not delivered to the [email protected] with the following error in /var/log/maillog:

    Mar 13 13:01:09 ppu17-5 postfix/smtpd[6797]: connect from localhost[::1]
    Mar 13 13:01:09 ppu17-5 postfix/smtpd[6797]: 7842561C3AA3: client=localhost[::1], sasl_method=DIGEST-MD5, [email protected]
    Mar 13 13:01:09 ppu17-5 postfix/cleanup[6801]: 7842561C3AA3: message-id=<[email protected]>
    Mar 13 13:01:09 ppu17-5 check-quota[6803]: Starting the check-quota filter...
    Mar 13 13:01:09 ppu17-5 /usr/lib64/plesk-9.0/psa-pc-remote[15087]: handlers_stderr: DATA REPLY:452:4.2.2 Mailbox full#012DEFER
    Mar 13 13:01:09 ppu17-5 /usr/lib64/plesk-9.0/psa-pc-remote[15087]: DEFER during call 'check-quota' handler
    Mar 13 13:01:09 ppu17-5 postfix/cleanup[6801]: 7842561C3AA3: milter-reject: END-OF-MESSAGE from localhost[::1]: 4.2.2 Mailbox full; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<webmail.example.com>

  • The same error appears in logs if [email protected] is disabled but its folder remains on the file system at /var/qmail/mailnames/example.com/destination/ and its size reached the mailbox limit set previously in Domains > example.com > Email Addresses > [email protected]:

    MailboxQuota.jpg

    # du -sh /var/qmail/mailnames/example.com/destination/
    105M /var/qmail/mailnames/example.com/destination/

Cause

The issue is caused by bug with ID #PPPM-10245, which is planned to be fixed in product future updates.

Resolution

As workaround, 

  1. Log into Plesk
  2. Switch Mailbox back on for the email [email protected] (or for [email protected] depends on whichever is limited) in Domains > eample.com > Email Addresses.

    Note: After re-enabling the mailbox, either free space or increase the mailbox limit

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