Yes. To do this, click on the ‘To’/’Cc’/’Bcc’ link. The Address book opens. Choose the contacts you want to mail and click on ‘Mail to’. All the Addresses get automatically added to the fields.
Note: In case you want to add names that are not present in the Address book, type them in the fields, separated by a comma.
Eg. email@example.com, firstname.lastname@example.org etc.