Store and find email addresses
When entering an email address you have in iCloud Contacts, you need to type only the first few characters in a To field of an email; iCloud automatically completes the email address for you.
Save email addresses in iCloud Contacts
View an email message from the person you want to add.
At the top of the message, click the sender’s name or email address.
In the window that appears, edit the contact’s name if necessary, then click Add.
Use addresses stored in Contacts
Open a new email message.
At the top right of the New Message window, click the Add button .
Do either or both of the following:
To add a recipient to the email, select To, Cc, or Bcc for each recipient, then click OK.
To search for a specific address, type a name in the Search Contacts field.
As you type, matching addresses are displayed. To use one of the suggested addresses, select the name and press Return.
To see all contacts again, click the Delete button in the search field.
If a mail message contains a vCard attachment, you can click it to add its contact information to your iCloud Contacts. For instructions, see Download or open email attachments.
For more information about Contacts, see Contacts overview.