Not receiving email on redirected / alternate domain

I have a primary domain and two alternate domains which all work fine, my problem has started when we redirected a new domain from an ISP in Oslo to the mailserver in London. I have updated the smtp inbound on the config setting and also the global domain config and the local users internet addresses, so as far as I can see all is the same as the other domains. My notes client has updated the location doc and I can send out using the new domain, however when anyone try’s to send mail to the new domain they get the following message: Remote host said: 553 Requested action not taken: mailbox name not allowed or chunk too large.

Please could someone help !!!

Thanks

Robert

Subject: Not receiving email on redirected / alternate domain

The problem was with my firewall, it was set up to accept mail to the existing domains only, once added new domain all ok.