What Does BCC Mean in Email? (And When to Use It)
BCC means blind carbon copy — recipients you add are hidden from everyone else on the email. Here is exactly what it does, when to use it, and how it differs from CC.
BCC = blind carbon copy. People in the BCC field get the email, but their address is hidden from everyone else — and BCC recipients can’t see each other. Use it to protect privacy when emailing a group, or to quietly loop someone in.
What BCC means
BCC stands for blind carbon copy. When you put an address in the BCC field, that person receives the email exactly like any other recipient — but their address is invisible to everyone else on the message. No one in the To, CC, or other BCC slots can see that they were included.
The term is a holdover from carbon paper, when a “carbon copy” was a duplicate of a typed letter. A blind carbon copy is a duplicate sent without the other readers knowing.
CC vs. BCC: the key difference
- To — the primary, visible recipients.
- CC (carbon copy) — additional recipients, visible to everyone.
- BCC (blind carbon copy) — additional recipients, hidden from everyone. They can see the To and CC names, but no one can see them, and they can’t see each other.
When to use BCC
- Emailing a group who don’t know each other. Sending an announcement to 40 clients? BCC everyone so you don’t leak the whole list of addresses to all 40.
- Quietly looping someone in. Want your manager to see a reply without the client knowing they’re watching? BCC them.
- Moving someone off a thread. A polite move: BCC the person being removed on your reply and note “moving X to BCC,” so they get the last message but aren’t stuck in the rest of the thread.
BCC etiquette and pitfalls
- Don’t use BCC to be sneaky. Secretly BCCing a third party into a sensitive conversation can backfire badly if they reply-all by mistake.
- BCC recipients shouldn’t reply-all. If you’re BCC’d, replying to everyone reveals that you were secretly included.
- For real mass email, use a proper tool. BCC works for a handful of people; for hundreds, use a mailing platform so you don’t hit spam limits.
Let your inbox handle the busywork
Knowing the rules is easy; remembering to apply them on a busy day is the hard part. Tomorrow is the AI inbox that drafts your replies, keeps threads organized, and handles follow-ups — on any mailbox, Gmail to custom domain — so the mechanics of email get out of your way. Every send still waits for your approval.
Frequently asked questions
What does BCC mean in email?
BCC stands for "blind carbon copy." Anyone you put in the BCC field receives the email, but their address is hidden from all other recipients — and BCC recipients cannot see each other.
What is the difference between CC and BCC?
CC (carbon copy) recipients are visible to everyone on the email. BCC (blind carbon copy) recipients are hidden — no one else can see that they were included.
Can BCC recipients see each other?
No. Each BCC recipient only sees the To and CC recipients, never the other BCC recipients. That is the whole point of "blind."
When should I use BCC?
Use BCC to protect privacy when emailing a group of people who do not know each other (so you do not expose everyone's address), to quietly keep someone in the loop, or to send an announcement to many people at once without a giant visible recipient list.
Does the recipient know they were BCC'd?
Only they know. A BCC recipient can see they were not in the To or CC fields, so they can infer they were BCC'd, but no other recipient is told that a BCC was used or who received it.
Let Tomorrow write the email for you
Tomorrow is the AI inbox that works on any email address. It drafts replies in your voice, handles follow-ups, and waits for your approval before sending.
