[Mailman-Users] Problem: bouncing - disabled

Hi everybody, I'm running Mailman with postfix on a RedHat 7.1, I'm getting an error for 2 adress e-mail's that are in a diferent server domain. I don't know if this is an error of my Mailman or Postfix or an error of the remote e-mail server, any idea? Part of the messenge that Mailman send

[Mailman-Users] Problem: bouncing - disabled

Hi everybody, I'm running Mailman with postfix on a RedHat 7.1, I'm getting an error for 2 adress e-mail's that are in a diferent server domain. I don't know if this is an error of my Mailman or Postfix or an error of the remote e-mail server, any idea? Part of the messenge that Mailman send