Does "Reply all" send replies to BCC recipients?

[Onamuji]

Todd's keyboard wrote:
Thanks.

Thinking this through, someone who was BCC'd can Reply All to everyone (except for other people who were BCC'd)?

thanks again, T's kb

If you received a message that had all of the other recipients BCCd then your copy of the message would not contain any of the other recipients' email addresses and your reply-all message would only be sent to the original sender.

If you received a message where some recipients were BCCd and some recipients were not BCCd then email addresses for those recipients who were not BCCd would be present in the copy of the message that you received.

If you then used "reply all" on that message where some recipients were BCCd and some were not then you would be replying to the sender and to those recipients who were not BCCd.