Each mail client has a slightly different method for adding a Mailbox to your mail client. You will need to use the following settings in order to retrieve your email.
POP3 Server: mail.noip.com, port 110 or 995 with SSL enabled.
IMAP Server: mail.noip.com, port 143 or 993 with SSL enabled.
Outbound SMTP: mail.noip.com, port 587 or 465 with SSL enabled (requires authentication).
Username: Your complete email address, e.g. firstname.lastname@example.org.
MX Record: mx.noip.com