The email address email@example.com reaches all members of this group. When replying to emails from this group, don't forget to switch the address to firstname.lastname@example.org instead of replying to only the person who wrote the message (unless that's the intention). Your email is not visible to the public by joining, but becomes visible to other members when you send an email to the group address. You may switch to have email entries by weekly digests or topic summaries if you wish. The emails may appear in your junkmail folder.