Linux · Mail Server: Postfix

You create a Linux account purely to receive mail, no interactive login allowed. What shell do you set, and why does the account still need a real password?

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More in Mail Server: Postfix

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You are configuring a mail client and must pick the right port. Which port is for server-to-server SMTP, and which is the submission port that clients should use to send mail?

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You add an entry to /etc/aliases to redirect root's local mail to your own account, but nothing changes. What step was missed?

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