What is the port number for IMAP services?

The port number for IMAP (Internet Message Access Protocol) services is 143. IMAP is a protocol used by email clients to retrieve messages from a mail server. Unlike its predecessor, POP3 (Post Office Protocol version 3), which uses port 110, IMAP allows users to access their email from multiple devices and keeps the messages on the server, enabling better email management and organization.

This protocol uses port 143 for standard communication, allowing secure retrieval of emails. When securing IMAP traffic, it can also utilize port 993, which is designated for IMAP over SSL/TLS, but the primary port is 143. A solid understanding of port assignments is essential for configuring firewalls and ensuring proper connectivity for email services, showcasing the importance of being familiar with these protocol specifications in the realm of Information Technology.