[exim] Exim Mainlog

Dear All,

I have something like this in my exim_mainlog file


2009-01-05 13:37:15 1LJkUP-0002YN-5u == user1@??? R=dnslookup
T=remote_smtp defer (-53): retry time not reached for any host
2009-01-05 13:37:15 1LJkUP-0002YN-5u == user2@??? R=dnslookup
T=remote_smtp defer (-53): retry time not reached for any host
2009-01-05 13:37:15 1LJkUP-0002YN-5u == user3@??? R=dnslookup
T=remote_smtp defer (-53): retry time not reached for any host
2009-01-05 13:44:13 1LJkUP-0002YN-5u => user1@??? R=dnslookup
T=remote_smtp H=mail.domain.com [xx.xx.xx.xx]*
2009-01-05 13:44:13 1LJkUP-0002YN-5u -> user2@??? R=dnslookup
T=remote_smtp H=mail.domain.com [xx.xx.xx.xx]*
2009-01-05 13:44:13 1LJkUP-0002YN-5u -> user3@??? R=dnslookup
T=remote_smtp H=mail.domain.com [xx.xx.xx.xx]*
2009-01-05 13:44:13 1LJkUP-0002YN-5u Completed


I want to know for what reasons, mail deferred (DNS resolution/Host SMTP
Down) and when delivering after 7 mins what denotes asterisk with IP
[xx.xx.xx.xx]*




Thanks,
Gaurav Pruthi