What is an email server?

• A. Delivers internet content to users
• B. Manages the flow of emails between email clients and the internet
• C. Stores cookies for websites
• D. Runs antivirus on incoming mail

Answer: (B)

An email server coordinates the movement of messages between people over the Internet. It acts as a mail transfer agent: it accepts outgoing mail from a mail client using SMTP, forwards it toward the recipient’s server or next hop, and stores incoming mail so the recipient can retrieve it later with IMAP or POP3. It also manages queues, retries, and basic filtering as part of delivering mail reliably across the network. This role directly captures the idea of “managing the flow of emails between email clients and the internet.”

This isn’t about delivering general web content (that’s what a web server does), nor about storing website cookies (that’s browser or website-related), and while some mail servers may run antivirus or spam checks, that’s not their primary purpose.