[Exim] message still in Q even after delivery

Hi,

I have messages still in queue even after delivery of mail.

28d   451 172CCT-00082N-00 <webmaster@???>
        D user@???

28d   905 172CD4-00082S-00 <webmaster@???>
        D user2@???

[root@mail /root]# more /email/spool/mqueue/msglog/172CCT-00082N-00
2002-04-29 15:32:23 user@???: remote_smtp transport succeeded


Any Clue?

TIA.