Question

You're setting up a secure email server on your local network that you want clients to be able to access from the Internet using IMAP4 and SMTP. Which ports should you open in your firewall?

a. 25 and 143
b. 587 and 993
c. 80 and 443
d. 25 and 110"

Answer 1

To securely access an email server using IMAP4 and SMTP, open port 993 for IMAPS and port 587 for SMTP over TLS in your firewall.

Step-by-step explanation:

To set up a secure email server accessible from the Internet, you need to configure your firewall to allow traffic on certain ports for the IMAP4 and SMTP protocols. For IMAP4, if you want a secure connection, you should open port 993, which is used for IMAPS (IMAP over SSL). For SMTP, you should open port 587, which is used for submitting outgoing mail securely (SMTP over TLS). The use of these ports helps to ensure that email data is encrypted during transmission, providing greater security for your email communications.