Final answer:
An Email server would use IMAP to retrieve and manage emails from a remote mail server.
Step-by-step explanation:
The type of server that would use IMAP is Email server. IMAP stands for Internet Message Access Protocol, which is used to retrieve and manage emails from a remote mail server. It allows users to access their email accounts from multiple devices and keeps the messages stored on the server. Other options like DNS (Domain Name System), DHCP (Dynamic Host Configuration Protocol), and FTP (File Transfer Protocol) are used for different purposes but not specifically for email management.