I recently received an email from a collaborator in which I was the BCC (Blind Carbon Copy). The original "To:" recipient was another collaborator who has a very similar email address to mine. Because of the similarity in addresses, and because I didn't see anything indicating I was a BCC (even in the detailed header information), I responded back to the original sender and the "To:" recipient pointing out the "mistake."

Obviously this defeated the whole purpose of being BCC'ed by the original sender.

Is there a way in Mail.app to show if I am the BCC of an email? I am not interested in seeing other BCC's on emails I receive. This was on Lion, if that makes any difference.

  • 3
    If you are BCC'ed, there is nothing in the body of the message making reference to your address (indeed, that is the point). So searching the headers for your address and not finding it means you were, effectively, BCC'ed. Note that this is how most mailing list mail is sent.
    – Daniel
    Feb 1, 2012 at 23:19

1 Answer 1


(Sorry for the lack of screenshots; I'm writing from a Windows machine right now)

Go to Mail > Preferences > Rules

Click "Add Rule"

For Description, enter "BCC" For the conditions, select "Any Recipient" "Does not contain" and enter your address in the third field For action, select "Set Color" "of background" "Purple" (or whatever color you chose) and click OK.

From then on, incoming messages not sent "To:" or "CC:" you will be marked in that color.

  • Exactly what I was looking for. Thanks for this, and the comment to the original question!
    – cm2
    Feb 2, 2012 at 18:31
  • I did this, but all messages marked "TO" me are set with the color. So how can you tell whether you received the email as a CC or as a BCC using this method?
    – user41425
    Feb 8, 2013 at 15:19

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