Announcement

Collapse
No announcement yet.

how exactly does BCC work

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • how exactly does BCC work

    Ok so here's an interesting one.

    I know how To/CC works - it writes the information into the headers. Accordingly, you can scan and create transport rules and filters and so forth on this information.
    I know that you cannot create a transport rule to act on a BCC address, at least not natively. (Sure, you can intercept an email and BCC it elsewhere, but that's not what I mean)

    So, let's assume I write an email. I decide to BCC it to my friend outside the company, with some confidential information in it.
    I hit send.
    the mail goes through the transport server, and out onto whatever SMTP channels it does.
    However - if, the moment I send that email, I can't see who it is BCC'd to when it's in my sent-items, how does Transport know where to send it?

    I'll try to ask it a bit simpler. If the BCC address doesn't exist in the email headers, how does Exchange know how to route it?
    Please do show your appreciation to those who assist you by leaving Rep Point https://www.petri.com/forums/core/im.../icon_beer.gif

  • #2
    Re: how exactly does BCC work

    http://en.wikipedia.org/wiki/Blind_carbon_copy


    That what you're wanting to know?

    So all it does it hide the emails in the BCC from other's view. The email address is still there, and viewable for the BCC recipient.
    Last edited by Managor; 19th November 2010, 17:07.
    "To err is human but to really **** things up requires a computer user..."

    "The path to enlightenment is /user/bin/enlightenment"

    A+ CE

    Comment


    • #3
      Re: how exactly does BCC work

      Hi,

      Actually the BCC field is in the message property however not visible but can be viewed using MFCMapi when for sent items. The property is PR_DISPLAY_BCC. As per the standard RFC the bcc info will be stripped off when message is sent out.

      I hope this will shed some light.
      Thanks & Regards
      v-2nas

      MCTS 2008, MCTIP, MCSE 2003, MCSA+Messaging E2K3, MCP, E2K7
      Sr. Wintel Eng. (Investment Bank)
      Independent IT Consultant and Architect
      Blog: http://www.exchadtech.blogspot.com

      Show your appreciation for my help by giving reputation points

      Comment


      • #4
        Re: how exactly does BCC work

        so conceivably, someone COULD write an application that hooked into the mailbox role, that was able to identify a BCC'd email as soon as the mailbox role picked it up, and make a copy of the address, right ?

        I mean - sure it'd take an ASSload of work..but if the transport server needs to know it to send it.. then surely the mbx role has the addrses also, at least until it's sent ?

        it'd need to fire prtty damn quick though right ?


        (I will try and read those articles, just not this exact moment)
        Please do show your appreciation to those who assist you by leaving Rep Point https://www.petri.com/forums/core/im.../icon_beer.gif

        Comment


        • #5
          Re: how exactly does BCC work

          Hi,

          yes you can write an eventsync if you know how to program. other option is you use transport rule like journaling... to and fro.. just test it out.
          Thanks & Regards
          v-2nas

          MCTS 2008, MCTIP, MCSE 2003, MCSA+Messaging E2K3, MCP, E2K7
          Sr. Wintel Eng. (Investment Bank)
          Independent IT Consultant and Architect
          Blog: http://www.exchadtech.blogspot.com

          Show your appreciation for my help by giving reputation points

          Comment


          • #6
            Re: how exactly does BCC work

            havne't been able to journal for BCC addresses yet - i think it's not possible

            this was mostly for knowledge sake
            Please do show your appreciation to those who assist you by leaving Rep Point https://www.petri.com/forums/core/im.../icon_beer.gif

            Comment

            Working...
            X