Has it been sent?

If you send to a group that you are not a member off you do not get a copy. So CC yourself if you are not a member and you will get a copy.

If you send to a group which you are a member of you will get a copy.

If you send to a group which you are a member of and do not get a copy you have done something wrong. Look in your send folder and check the outgoing mail. Computers are pedantic, have you spelt the name of the group correctly eg using PRINCIPLE rather than PRiNCIPAL, have you sent from your imtfa account?