Hello,
when sending email from websites, the message does not get sent and I get this error in /var/log/maillog:
Sep 4 21:56:19 weba py_limit_out[7953]: ERROR Rejecting forged message: PPP_SENDER_VHOST_ID environment variable value is invalid
Sep 4 21:56:19 weba journal: plesk sendmail[7952]...