I am getting the following message from my logwatch. I am using RedHat 9. Also I am getting hundreds of mails rebound from Mailer Delivery System showing following message:
Does this means my server is being used by someone for sending spam mails.
Please some one help me out.




The original message was received at Sat, 30 Aug 2008 05:07:15 +0530
from localhost
with id m7TMM5Ag008167
Content-Type:
----- The following addresses had permanent fatal errors -----
<INFO@COCACOLOTTERY.COM>
----- Transcript of session follows -----
550 5.1.2 <INFO@COCACOLOTTERY.COM>... Host unknown (Name server: cocacolottery.com: host not found)



The original message was received at Sun, 31 Aug 2008 10:29:45 +0530
from localhost
with id m7V4PQaC022383
Content-Type:

----- The following addresses had permanent fatal errors -----
<jkamoka1@live.com>
(reason: 550 OU-001 Mail rejected by Windows Live Hotmail for policy reasons. Reasons for rejection may be re...l/network admins, please visit http://postmaster.live.com for email delivery information and support)

----- Transcript of session follows -----
451 4.4.1 reply: read error from mx4.hotmail.com.
.... while talking to mx3.hotmail.com.:
>>> MAIL From:<> SIZE=4143
<<< 550 OU-001 Mail rejected by Windows Live Hotmail for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation problems. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/network admins, please visit http://postmaster.live.com for email delivery information and support
554 5.0.0 Service unavailable






Authentication warnings:
apache set sender to INFO@COCACOLOTTERY.COM using -f: 3 Times(s)
apache set sender to chevrontexaco@chevron.com using -f: 6 Times(s)
apache set sender to info@yahoo.it using -f: 39 Times(s)
apache set sender to mittalrk@localhost using -f: 4 Times(s)

Unknown hosts:
actom.co.il: 1 Times(s)
altmail.bezeqint.net.: 1 Times(s)
hillagric.ernent.in: 1 Times(s)
cocacolottery.com: 130 Times(s)

Uhhhhh, why is /dev/null a directory instead of a device???