Emails are not sent or received in Plesk while Amavis reports the error: Suicide in child_init_hook: BDB can't connect db env

Symptoms

• Amavis reports the following error message in /var/log/maillog:

  CONFIG_TEXT: Message: (!)_DIE: Suicide in child_init_hook: BDB can't connect db env. at /var/spool/amavisd/db: BDB0091 DB_VERSION_MISMATCH: Database environment version mismatch, Operation not permitted. at (eval 79) line 338.

• Emails may not be sent and or received.

Cause

Amavis worker processes stuck and fail to initialize the Berkeley DB environment in /var/spool/amavisd/db/, preventing email processing.

In some cases, the issue occurred after system package updates, but a direct connection has not been confirmed. Further investigation is required to determine the root cause.

Resolution

The following workaround can be used to restore email delivery until the root cause is identified and a permanent solution becomes available:

1. Connect to the server via SSH.

2. Restart the amavisd service:

   # service amavisd restart

3. Force deferred emails in the mail queue to be delivered:

   # postqueue -f

   # postsuper -r ALL