It seems that there was an issue with the mail server software of the main imcdb server.
I restarted one component this morning, and now I notice another component was taking a lot of CPU, so I also restarted it.
Maybe it was part of the issues since yesterday?
I'll probably move the mail part to the other server (with the comment pics and my own site) as that other server is less used than the main imcdb server.

I also added a new bot to the botlist.