tail -fvn0 /var/log/exim_mainlog

used to check maillog in nice/completed order.

Sample result:

[root@bearbear]# tail -fvn0 /var/log/exim_mainlog
==> /var/log/exim_mainlog <==
2009-12-14 11:42:28 1NK1pM-0003p6-2X <= bearbearbb@bbb.com U=myiwaco P=local S=1933 id=d7c01d1bc7a61720506c69c3ba71d21b@bbb.com
2009-12-14 11:42:39 1NK1pM-0003p6-2X => raebraebb@raebb.com R=virtual_user T=virtual_userdelivery
2009-12-14 11:42:40 1NK1pM-0003p6-2X Completed
~End~