The correct port number is crucial for several reasons:
1. Ensures Deliverability: Using the correct port number ensures that your emails are delivered to the intended recipients without any disruptions. 2. Security: Some port numbers offer encryption (e.g., 465 for SMTPS and 993 for IMAPS), which provides additional security for your email communications. 3. Compliance: Many email service providers mandate the use of specific port numbers to comply with their security and operational guidelines.