The different e-mail ports are:
Protocol | Port | Protocol |
PoP | 995 | SSL/TLS |
IMAP | 993 | SSL/TLS |
SMTP | 587 | STARTTLS with normal cleartext password (it is encrypted with STARTTLS) |
You should use the domain name of your portal (muXX.cbpolis.com) as mail server address, so that you can use valid SSL certificates for accessing your email.