Consider the following figure from your textbook illustrating the steps and protocols used to send an email message from Alice's computer to Bob's Computer: 3. Alice's mail server Bob's mail server Alice's Bob's agent SMTP POP3, agent SMTP IMAP, or HTTP Figure 2.16 E-mail protocols and their communicating entities What service does Alice's mail server provide? Why is it necessary/useful to forward an email from Alice's agent to Bob's mail server through Alice's mail server? (10 points) Consider the following figure from your textbook illustrating the steps and protocols used to send an email message from Alice's computer to Bob's Computer: 3. Alice's mail server Bob's mail server Alice's Bob's agent SMTP POP3, agent SMTP IMAP, or HTTP Figure 2.16 E-mail protocols and their communicating entities What service does Alice's mail server provide? Why is it necessary/useful to forward an email from Alice's agent to Bob's mail server through Alice's mail server? (10 points)