[MM3-users] mailman3 does not send to the members of the lists

Goodmorning everyone, I'm setting up a mail server to manage a mailinglist. I installed mailman3-full and configured everything. I can create a list, add members to the list, but when I create a new thread, I only get it on the email from the same domain as the list. While all the other members of the list, they do not receive the thread. I tried to check the logs, but I don't see anything significant. What can I check? Thank you in advance Max