Christophe told me it wasn't possible to receive notification mails on comments you posted on my website. He was right, because I had a problem with permissions.
But after configuring the permissions, Christophe was still complaining ;-)!
After some research, I noticed something weird to the logger of Drupal:
Type Date Message User Operations ... comment_notify 02/15/2010 - 20:53 Notified: Jochus source comment
In the PHP code, I found this piece of code:
So, normally, the subject should be: Notified: $HERE_COMES_THE_EMAIL_ADDRESS. But I noticed this was a typo in the logger. The correct implementation is:
While debugging the code, every mail was received correctly. So it seems to be working "sometimes" ... I haven't figured out what's going wrong here.