Feature Request: Add CC/BCC support in email compose

Feature Request: CC/BCC Support

Current Behavior

The compose window only has a "To" field. There is no way to add CC or BCC recipients.

Expected Behavior

Add CC and BCC input fields in the compose window, similar to standard email clients.

Use Case

CC and BCC are standard email features used in almost every business and personal email workflow:

• CC: notify additional recipients who should be aware of the conversation
• BCC: send to multiple recipients without exposing their addresses to each other

Technical Notes

Resend API already supports cc and bcc parameters natively:

• https://resend.com/docs/api-reference/emails/send-email

So the implementation would mainly involve:

1. Adding CC/BCC input fields in the compose UI (mail-vue)
2. Passing the values to the send email API in the backend (mail-worker)

Environment

• Cloud Mail version: v3.2.0
• Domain: self-hosted on Cloudflare Workers

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This is a commonly requested feature. Would love to see it in a future release!