Hi,

do you configure maildrop with the params: ... --enable-maildropmysql --with-mysqlconfig=/etc/maildrop/maildropmysql.cf ... ?

What ist in your master.cf about maildrop? e.g. there should be maildrop unix - n n - - pipe flags=Ru user=maidrop argv=/usr/local/bin/maildrop -d ${recipient}