** Users in your domain must be able to send emails to users in the same domain and users in other students' domains in the class.
** Users in your domain must be able to receive emails from other email users (both in your domain and from other domains).
* An IMAP Access Agent (running dovecot) allowing users in your domain to remotely access their mail.** Users in your domain must be able to access/manage their mail box using IMAP(s) clients.
* You email server must be configured to check the SPF (sender policy framework) of other domains for incoming email and reject emails that are violating the sender policy.
* Configure your DNS server to implement and provide the SPF protection for your assignment domain.