I have a weird problem on Plesk 8.6 (CentOS 5.7).
After a server restart, no mail gets delivered thru qmail. Neither to the local mailboxes nor to external addresses. All mail gets accepted, and no error message gets thrown, but the mails disappear. They're not even in the queue. The queue is empty.
In the maillog (/usr/local/psa/var/log/maillog) I get errormessages like this:
all addreses are uncheckable - need to skip scanning (by deny mode)
Unable to check directory entry dd51-domainkeys: Invalid argument
DNS works (for example
dig MX gmail.com returns the appropriate records).
I can also telnet to port 25 on external servers.
An example log showing what happens from the mail arriving until giving up can be found here: http://dl.dropbox.com/u/4392893/qmail-issue-log.txt
Any idea would be greatly appreciated.