116 votesPatrick Chokron commented
I urge Mailtrap to reconsider this request. As a business customer that relies on Mailtrap to test transactional emails on a regular basis, I need a mechanism to verify that BCC email recipients are included on outgoing emails. This is an essential function that is, as the votes here indicate, also quite popular amongst your users.
Technically, there is no reason it cannot be done, as clearly, your SMTP server must receive this information.