Create an Address Book Entry for Undisclosed Recipients
An Undisclosed Recipients contact allows you to add a group to the To field without disclosing any information about any of the email recipients. To set it up:
Open the Contacts app on your iPhone, then select the plus sign + to create a new entry. In the First name text box, enter Undisclosed. In the Last name text box, enter Recipients. Select Done when finished. You can put both words into the First Name text box if you prefer. On the contact page, choose Edit. Select add email, enter your email address, then choose Done to save your changes. Your Undisclosed Recipients contact is ready to use.
Send an Email to Undisclosed Recipients in iPhone Mail
To send an email addressed to Undisclosed Recipients in iPhone Mail:
Open the Mail app, then select the New Message icon. Next to the To text box, select the + icon. Scroll down and tap the Undisclosed Recipients entry, or use the Search field to find it. Choose Cc/Bcc, From. In the Bcc text box, enter the recipients of your email. Compose the email message, then select Send. Recipients will only see the email address included in the Undisclosed Recipients contact, which is your email address.