It has come to our attention that email messages are being sent to random addresses @cwi.nl
The messages indicate that something in your profile or your account has to be changed. They are signed by 'webmaster CWI'
The messages are quite harmless, as they do not ask you to go to a webpage or click on a link. All the same we like to point out that they are NOT sent by the webmaster CWI. Mails sent by the webmaster will always be signed with his name: Ben Brandenburg.
You can safely delete the spam messages.