Mailing list not working

[prashantbhushan]

Hello,
I am not getting any mails sent to mailing list.

Mailing list name :- [email protected]
Mail Sent from :- [email protected]
Server Hostname :- myhost

Mainlong shows :

2007-01-05 11:47:49 1H2iOj-00055j-Fm <= [email protected] H=mails.from.com (from.com) [111.111.111.11] P=smtp S=546 [email protected] T="test mail 11:54 AM" from <[email protected]> for [email protected]
2007-01-05 11:47:52 1H2iOj-00055m-HS <= [email protected] U=mail P=spam-scanned S=882 [email protected] T="test mail 11:54 AM" from <[email protected]> for [email protected]
2007-01-05 11:47:53 1H2iOn-000562-2Q <= mysql@myhost U=mysql P=local S=571 T="MAJORDOMO ABORT (mj_resend)" from <mysql@myhost> for owner-helpdesk
2007-01-05 11:47:53 1H2iOn-000562-2Q ** owner-helpdesk@myhost F=<mysql@myhost>: Unrouteable address
2007-01-05 11:47:53 1H2iOj-00055m-HS => |/etc/virtual/majordomo/wrapper resend -C /etc/virtual/mydomain.com/majordomo/majordomo.cf -l helpdesk -h mydomain.com -f owner-helpdesk [email protected] <[email protected]> F=<[email protected]> R=majordomo_aliases T=majordomo_pipe S=928
2007-01-05 11:47:53 1H2iOj-00055m-HS Completed
2007-01-05 11:47:53 1H2iOj-00055j-Fm => helpdesk <[email protected]> F=<[email protected]> R=spamcheck_director T=spamcheckS=796
2007-01-05 11:47:53 1H2iOj-00055j-Fm Completed
2007-01-05 11:47:53 1H2iOn-000564-3w <= <> R=1H2iOn-000562-2Q U=mail P=local S=1422 T="Mail delivery failed: returning message to sender" from <> for mysql@myhost
2007-01-05 11:47:53 1H2iOn-000562-2Q Completed
2007-01-05 11:47:53 1H2iOn-000564-3w => mysql <mysql@myhost> F=<> R=localuser T=local_delivery S=1567
2007-01-05 11:47:53 1H2iOn-000564-3w Completed

please suggest...