Pre­sum­ably due to a SSM bug in the Linux ker­nel, the backup npw.net server crashed some days ago. Since my ISP is about 500 km from here, I had to wait until Monday for my pro­vider to restart the server. Now it is up again. The fol­low­ing mes­sage was logged to syslog:

Jul 18 08:39:20 localhost sm-mta[30237]: rejecting connections on daemon MTA-v6: load average: 978

Quite a high load, isn’t it? :)