Your network contains an Active Directory forest. The forest contains two domains named contoso.com and wingtiptoys.com. The network contains a public DNS server named Server1 and an e-mail server…

Your network contains an Active Directory forest. The forest contains two domains named contoso.com and wingtiptoys.com. The network contains a public DNS server named Server1 and an e-mail server named Server2. You notice that Internet hosts can send e-mail messages to users that have the @contoso.com SMTP suffix, but cannot send e-mail messages to users that have the @wingtiptoys.com SMTP suffix. You need to ensure that every user can receive e-mail messages from the Internet. Which type of resource record should you add to the wingtiptoys.com zone?