[SOLVED] new install -> admin login not working

[HSorgYves]

I finally found other problems in the error.log:
postdrop: warning: mail_queue_enter: create file maildrop/355784.2690: Permission denied
(...)

This has to do with ispCP sending a mail by default when an admin logs into the control panel... however my permissions on /usr/sbin/postdrop and /usr/sbin/postqueue were messed up, so that this mail could not be delivered! Setting the permissions on these two files back to what they should be solved the problem.

Thanks for your assistance joximu!

P.S.: I have a few "open" threads left ;-)