Group member sending message to group email does not get message

Group member sending message to group email does not get message

1. I created my zoho account and have an admin user:

      moderator@externaldomain.com (This is an admin email address set up with an external domain with all MX records       properly set, etc.)

2. I created a group named group@externaldomain.com

3. Set permissions to EVERYONE

4. I added 3 external email addresses as users.

      user1@yahoo.com
      user2@gmail.com
      user3@outlook.com

When user1 sends in an email to the group email address, user2 and user3 (And the moderator)
get the email

user1 who sent the message does not get the message that he sent. This causes that user to think that the message has not been sent, and then he sends it again with the same result.

Is there a way to have the user who sends a message into a group email address also get the message that he sent?