If you set up your e-mail client manually, you will need the information for the outgoing mail server (SMTP server).
Address of the outgoing mail server: smtps.udag.de
Port: 587 (STARTTLS) or 465 (SSL/TLS)
Also, enter the username of your e-mail account. This username corresponds to the name of your mailbox ( e.g. musterdomainde-0001 ) or you can use your e-mail address as the username.
Use the password for your e-mail inbox as the SMTP password.