Reply To: Problem with the default "do not reply" email address
Onto the biggest issue is that the wpMandrill plugin for WordPress DOES NOT support BCC:
In the help overview of the wpMandrill plugin there is this: (emphasis mine)
Note that if you’re sending additional headers in your emails, the only valid headers are From:, Reply-To:, and X-*:. Bcc: is also valid, but Mandrill will send the blind carbon copy to only the first address, and the remaining will be silently discarded.
I asked Mandrill about this this morning:
@netweb Not for that specifically, but this article on modifying the payload in wpMandrill is a great starting point: http://t.co/e9jmRTdbV4
— Mandrill (@mandrillapp) June 18, 2014
Where to next I’m not sure, I’ve only just started to take a look at Mandrill as I’ve never used it before, ideally if the wpMandrill plugin supported the full Mandrill API then using BCC would not be an issue.