When you send an email to a group of people you do not want the group to receive replies if one of the recipients decides to "reply to all".
Also, many recipients do not want their email address to be broadcasted to the world.
Blind carbon copy is the answer to your problem. You should put your own email address in the TO field and your mailing list into the BCC field. The BCC list does not appear to the people that receive the email and if they "reply all" only you will get the response.
In some email clients you will need to explicitly turn on the BCC option.
When you put your address in the TO field this will cause at least one address to appear in the email. You want to make this happen because some email systems may classify an email with no TO address as SPAM.
Listen to the radio audio.