Email communication relies on several ports for sending and receiving messages. The following are some of the most commonly used email ports and their associated email protocols:
- Port 25: SMTP (Simple Mail Transfer Protocol) – This port is used for sending outgoing email messages. It’s the standard for email transmission between servers.
- Port 587: SMTP – This is an alternative port for sending email, often used for authenticated and encrypted email submissions.
- Port 110: POP3 (Post Office Protocol version 3) – Used for retrieving email messages from a mail server to a local email client. This is a standard for receiving email.
- Port 995: POP3 over SSL/TLS – The encrypted version of POP3 for secure email retrieval.
- Port 143: IMAP (Internet Message Access Protocol) – Another protocol for retrieving email messages from a mail server. It allows users to view their messages without downloading them, making it suitable for multiple devices.
- Port 993: IMAP over SSL/TLS – The encrypted version of IMAP for secure email retrieval.
- Port 1100: POP3 over TLS/SSL – An alternative secure version of the POP3 protocol for encrypted email retrieval.
- Port 587: Submission – This port is also used for email submission, particularly with authentication and encryption.
These ports are essential for email communication and are used by email clients, mail servers, and email services to send, receive, and access email messages. Email protocols like SMTP, POP3, and IMAP ensure the smooth flow of email messages between email clients and servers. The use of secure variants of these protocols with SSL/TLS encryption enhances email security
