[Mailman-Users] mailbox unavailable

[Denny Zulfikar]

Dear

I am trying build mailman 2.1.11 with postfix virtual, but still got error.
Creating lists are success, also invite member also success. but, if I
try to reply the invitation mail or send an email to a list, it
displays some errors.

error on reply invitation mail:
Message not sent. Server replied: Requested action not taken: mailbox
unavailable
550 5.1.1 <crews-request at domain.com>: Recipient address rejected: User unknown

error on send to a list (after approved by click the url on invitation mail):
Message not sent. Server replied: Requested action not taken: mailbox
unavailable
550 5.1.1 <crews at domain.com>: Recipient address rejected: User unknown

please give your hand.

best regards,
Denny