Paul Cocker wrote:
> How does Postfix handle BCCs in terms of visibility? I was checking
> whether a 3rd party would be able to access the BCC list if they
> received an e-mail with BCC recipients, but was unable to determine
> whether:
>
> A) This is dependent upon all mail servers in the chain or only the
> e-mail gateway on our side
>
> B) Postfix includes the BCC header and thus provides a route for people
> to find out who was BCC'd
>
BCCs are not headers. They are envelope recipients.
Mail clients simply translate them into RCPT TO on delivery and never
add them to the header.
