defered mail

[tethys ocean]

My problem is about defered mail.  On our server sendmail is running
and sometimes some mail defered. I am researching how I can get
managed to send defer mail information to senders?  I am taking a mail
from root but sender didnt take a mail that consist "your mail defered
bla bla bla....so I will take next tree minutes".. is it possible? if
it is possible how I can manage?


in sendmail.cf 
         
         O Timeout.queuereturn=2d
         O Timeout.queuewarn=4h
         O Timeout.queuewarn.normal=4h 


mailq
                /var/spool/mqamavis (5 requests)
-----Q-ID----- --Size-- -----Q-Time-----
 ------------Sender/Recipient-----------
 iBVC8fpT049046-    6361 Fri Dec 31 14:12 <alex at xxx.com>
                  (host map: lookup (bbscomputer.net): deferred)
                                          <info at bbscomputer.net>
 iBVCIB9u051147-    6361 Fri Dec 31 14:21 <alex at xxx.com>
                  (host map: lookup (bbscomputer.net): deferred)
                                          <info at bbscomputer.net>
 iBVDjmck072838-   19579 Fri Dec 31 15:46 <alex at xxx.com>
                  (host map: lookup (gesan.com.tr): deferred)
                                          <gesan at gesan.com.tr>
 iBV68HLM055154-      30 Fri Dec 31 08:08 <tethys at xxxl.com>
                  (host map: lookup (active.net): deferred)
                                          <info at active.net>
 iBVAnlhq030740-  354708 Fri Dec 31 12:49 <toto at xxxl.com>
                  (host map: lookup (jungletree.org): deferred)
                                          <theo at jungletree.org>
                 Total requests: 5