Senots21 said:
Would "Reply all" work for a Bcc recipient? This could be a bit tricky
if you
don't want Bcc recipients to see each other.
Thanks in advance
The recipient never gets the e-mail address of those you put in the Bcc
*field*. The Bcc data only exists as a field for input data in your
e-mail client. It never gets included as a header (well, actually it
can in some very old mail servers but if you find it gets included then
notify your ISP their mail server configuration is screwed up). An
aggregate of all the recipients listed in the To, Cc, and Bcc fields in
your e-mail client is used in generating a list of RCPT commands that it
sends to the SMTP server. The To, Cc, Bcc, Subject, and Reply-To
headers are optional; i.e., they may appear zero or one times. They are
part of the *data* of your message that gets sent during the DATA
command and are NOT used in routing your message. Fact is, these header
may be omitted or having values different than what the e-mail client
uses in the RCPT command(s). Where your message gets delivered depends
on the RCPT command, not on the To, Cc, and Bcc fields. In fact, bulk
mailers send a canned message which might have static values for To (and
which might not even be an e-mail address) and then send the message to
a list of recipients in a separate file that it uses to compile the list
of RCPT commands it sends to the SMTP server.
In short, the recipient should never get a message which includes the
Bcc header. So they can never know or send e-mails to those recipients.
They can only send to whomever was listed in the To or Cc headers (but
which may not be the same recipients are were specified in the RCPT
command used by the sender).
