cPanel servers serve as vital platforms for email communication, and understanding the different mail ports they utilize is crucial for configuring email clients and ensuring reliable message transmission.
Below, we will introduce the key mail ports used for SMTP, POP3, and IMAP protocols on cPanel servers.
SMTP port on TLS/STARTTLS connection: 587 (recommended)
SMTP port on SSL connection: 465
SMTP default non-encrypted port: 25
POP3 on SSL port: 995
POP3 on non-SSL port: 110
IMAP on SSL port: 993
IMAP on non-SSL port: 143
SMTP Hostname must have a valid SSL certificate installed to use the SSL/TLS ports.
