Can zoho smtp host the mailing list server

Can zoho smtp host the mailing list server

I host a mailman server, and use zoho to host smtp service. Any subscriber can send emails to the mailing address, then emails will be sent out to all subscribers. My problem is that mailman cannot send out emails, since they have been bounced. The error I got is "553 Relaying disallowed as 'Name of a subscriber < XXXXX@gmail.com>".