Allow excluding conversations for email within bcc

[wotta]

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• PHP version: 8.2
• SDK version: 3.9.0

Current behavior
According to the customer support employee that I spoke it is not possible however, It would certainly be helpful if we can get a way to do this without needing to do this on our side.

Expected behavior
I would love to have conversation about this with someone who is able to help us get in contact with somebody who can and is willing to talk about this in order to see if this feature could be implemented.