The error is shown in an attempt to reload mail-related services on Plesk server: /etc/init.d/courier-imapd: IMAP: not found

Symptoms

• In an attempt to reload the IMAPD, POP3D or POP3S services on a Plesk server, the following error is shown:

  # /etc/init.d/courier-imapd reload
  /etc/init.d/courier-imapd: 20: /etc/init.d/courier-imapd: IMAP: not found

  ---

  # /etc/init.d/courier-pop3d reload
  /etc/init.d/courier-pop3d: 19: /etc/init.d/courier-pop3d: POP3: not found

  ---

  # /etc/init.d/courier-pop3s reload
  /etc/init.d/courier-pop3s: 19: /etc/init.d/courier-pop3s: POP3: not found

• The prog variable in the configuration files of the affected services includes extra quotas:

  # cat /etc/init.d/courier-imapd /etc/init.d/courier-pop3d /etc/init.d/courier-pop3s | grep -i prog
  prog=””Courier IMAP server””
  prog=””Courier POP3 server””
  prog=””Courier POP3 server with SSL/TLS support””

Cause

This is the Plesk bug with ID #PPPM-8205 which is planned to be fixed in future Plesk updates.

Resolution

Until the bug will be fixed, apply the workaround below:

1. Log into the server via SSH.

2. Restart affected services using the required command:

   • For courier-imapd:

     # systemctl courier-imapd restart

   • For courier-pop3d:

     # systemctl courier-pop3d restart

   • For courier-pop3s:

     # systemctl courier-pop3s restart