Настраиваю postfix и maildrop, возникла ошибка

to=<test@test>, relay=maildrop, delay=1191, delays=1190/0.01/0/0.13, dsn=4.3.0, status=deferred (temporary failure. Command output: ERR: authdaemon: s_connect() failed: No such file or directory /usr/lib/maildrop/bin/maildrop: Temporary authentication failure. )

Но файл есть :

rwxrwxrwx 1 courier courier 1209144 /usr/lib/maildrop/bin/maildrop