I only see ways to set multiple recipients, what if I want to BCC some recipients, how would I accomplish that in Curl? Google searching, I'm surprisingly not coming up with anything.
Here's what my command currently looks like. I'm sending from $from_email to emails: $to_email_1 and $to_email_2.
curl -s "$url" \
     --mail-from "$from_email" \
     --mail-rcpt "$to_email_1" \
     --mail-rcpt "$to_email_2" \
     --ssl \
     -T "email_content.txt"
Let's say I want to BCC $to_email_2. How would I accomplish that with Curl?