A network administrator is setting up a secure email transmission service that encrypts SMTP traffic. Which port should the administrator configure the email server to listen to in order to secure email messages?
Port 25
Port 993
Port 587
Port 443
Port 587 is used for secure email communication over SMTP, commonly known as SMTPS. This port allows email to be sent securely via an encrypted connection, which is crucial for protecting sensitive information during transmission. Port 25 is the default for unencrypted SMTP, and while port 443 is commonly used for HTTPS, it is not used for securing SMTP. Port 993 is for IMAPS, which is used for receiving emails securely, not sending.
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