How do I add another Yahoo group to my Yahoo group?

In Yahoo!groups, how can I add to the subject of the messages sent to the e-mail group the name of the group?

• I participate on an e-mail group that all of the e-mails sent to the group appears with the name of the group in between brackets on the subject. Now I have just started another group and it doesn't happens. I want to know how to do that and how to manage some settings like permit only approved members on the e-mail group. I'm sorry if it is confuse. Thanks

• Answer:

  the group name should be in those brackets unless you're not sending it to the roup address, like if some one posted to the group and a member replied to it but sent it to the sender instead, the group name may not be there. this also will only appear in your in box- there's no setting for that, it's just default. restricted memebrship is what you're wanting- management- under group settings click membership- Membership Type and Welcome Message (Edit) <-- click the edit- select restricted- click save changes