The imap of the mailbox is basically the same, such as the imap port of QQ mailbox:

IMAP: The default port is: 143 (if ssl security link is checked, the port number is 993).

Knowledge supplement:

POP3: The default port is: 1 10 (if ssl security link is checked, the port number is 995).

SMTP: The default port is: 25 (if ssl secure link is selected, the port number is 994).