How to Hide Your Contacts in Emails on Gmailby Aaron Charles
Making contacts' emails invisible on Gmail all comes down to the blind carbon copy feature. If you send an email to multiple Gmail contacts but you don't want each recipient to see the other recipients, this is the feature you use. It can be easy to overlook if you haven't used Gmail in a while; in 2012, Google redesigned Gmail's email composition format, which affected the location of the Bcc field. It's still there, though, and you can use this function in at least two ways.
Sign into Gmail and click "Compose." Click "Bcc" to the right of the "To" field.
Enter each contact's email address to whom you want to send the message. Separate each address with a comma.
Type your message and click "Send." Each recipient will see only her email address in the email message, and not the address of anyone else.
Sign into Gmail and click the drop-down arrow next to "Gmail," then select "Contacts."
Check the box next to each person to whom you want to send a message, then click the message icon to open a new email composition page.
Click the field in which the contacts are listed. Gmail automatically places them in the "To" field.
Press and hold the "Ctrl" key while clicking each contact that you want to be hidden from others' sight in the email, then click and drag the group of contacts to the "Bcc" field and release the "Ctrl" key.
Type your message and click "Send."