Start new conversations from
Choose the email address or phone number you want to use when you start a new conversation with someone. The person receives messages sent from the email address or phone number you choose.
When someone starts a conversation with you, you send messages using the email address or phone number the person used to start the conversation.
About iMessage and FaceTime & Privacy
Learn how iMessage and FaceTime are designed to protect your information and allow you to choose what you share.
Blocked
Review addresses or phone numbers of people that are blocked. See iPhone Manuals website