Go to the "App key" at the bottom left.

Search for the mail program as shown in the picture.

Now select "Other (POP3/IMAP)".

Now select "Manual Setup"...

Under "Protocol" you can now select how you want to set up your mailbox.

Either POP3 or IMAP.

In the left picture you can see the settings for the POP3 mailbox (incoming mail server without SSL).

The right picture shows the settings for the IMAP mailbox (incoming mail server with SSL).

If you want to use POP3 with SSL, you must use the settings as for incoming mail server with SSL.

When you are finished with the settings, go to "Next"...

Replace all fields with the information about your e-mail box.

You can also find this in your customer login under "E-mails -> Server information".

In the left picture you see the settings for the POP3 mailbox (outgoing mail server).

In the right picture you can see the settings for the IMAP mailbox (outgoing mail server).

If you want to use POP3 with SSL, you have to specify our direct server at "SMTP-Server".

(Your server information can be found under "E-Mail Server Information")

Set the security type to SSL.

Note:

 If you do not know your personal data for this:

If you do not know your personal data for this and the following steps, you can log on to checkdomain.net/en in your customer area and select "e-mail administration".

Here you will find your data for your e-mail inbox.

The data to be entered for the incoming mail server and outgoing mail server, which you can find in the following 

steps, you will find under the item "E-mail server information".

Now you can give your account a name (account name).

At "Your name" enter your name, which should be sent with the email.

Now just press "Finish Setup" and the mailbox is set up.