Using and Testing Cc and Bcc in SMTP Protocol

When we talk about email sending and testing, we usually pay attention to the message headers. We define and check “to”, “from”, “subject”, and then work with the message body. In this post, we will focus on the message copies - Cc and Bcc. Why does just one letter make such a big difference? And why is it so hard to test Bcc in emails? To get the answers, we will refer to the SMTP mechanics. Also, we will share some email tips and explain how you can test Bcc with Mailtrap.