When managing a website or online business, you often need to send emails to multiple recipients simultaneously. This can be done in several ways, each with distinct purposes and privacy considerations.

The two primary methods are:

• To: All recipients see each other's email addresses. Suitable for groups where everyone knows one another.
• CC (Carbon Copy): Recipients see the main "To" address and all other CC'd addresses. Used for keeping parties informed.
• BCC (Blind Carbon Copy): This is the most important for privacy. No recipient can see the other BCC addresses. Always use BCC for mass newsletters or announcements to protect contact information and prevent spam.

For sending to very large lists, use a dedicated email marketing service (like Mailchimp or Sendinblue) instead of your regular email client. These services manage subscriptions, handle bounces, and ensure compliance with anti-spam laws (like CAN-SPAM or GDPR).

When using your hosting's email features (e.g., through cPanel), you can often set up email forwarders or mailing lists to automate sending to groups. Remember: sending bulk email through a standard hosting account without proper configuration can get your server blacklisted for spam.

In summary, use BCC for small, ad-hoc groups and a professional email marketing platform for larger, regular communications to ensure deliverability and maintain your sender reputation.