[Mailman-Users] Mail are not going out from mailman...

[Nitin Bhadauria]

Dear All,

One of my list with 6000 users is not sending mail to all the users of a 
same domain, I search over the logs of postfix and the only error i 
found is some of the user on the domain are not accepting the mails........

reply: '550 <user at abc.net>: Recipient address rejected: User unknown in 
virtual mailbox table\r\n'
reply: retcode (550); Msg: <user at abc.net>: Recipient address rejected: 
User unknown in virtual mailbox table

Is it possible that mailman is not sending mails to all the users on the 
domain or mails are send domain wise so all the mail stuck. Any way i 
didn't find any thing in the qfiles.

Please help me out ...........

Thanks
Nitin