A user calls in to report that their email client is not able to retrieve mail from the server. They mention the client is set up for non-secure email retrieval. As you inspect their settings, you notice that they may have incorrectly configured the port for their inbound mail server. Which port should be used for the inbound mail server using non-secure IMAP?
Non-secure IMAP services typically use port 143. This is the default unencrypted port for IMAP, the protocol that deals with managing and retrieving email. On the other hand, port 993 is used if secure IMAP (IMAP over SSL) is configured. Port 110 is for POP3 (Post Office Protocol), another email retrieval protocol but typically used for downloading emails to the local client. Finally, port 25 is used for SMTP (Simple Mail Transfer Protocol) for sending emails, not receiving.
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