qmail crapping on you again? check whether the file /var/qmail/bin/qmail-scanner-queue.pl exists.

the problem with qmail is that even if you managed to get it to work, you do not understand why it worked. i'd wager that you don't. i've learnt that and use postfix instead ever since. clear documentation, clean architecture, i understand the how it works. and more importantly, less headache.

can't help you with qmail. learned my lesson long time ago. sorry.

too bad your problem got worse. i wish i can help you with a practical solution that is to change your MTA.