Open your Gmail App > Settings > Add account
Choose Other as email
Please press Other to continue.
Enter your email address
Please press Manual Setup to continue.
Choose the account type IMAP
define incoming Server
Enter your username (email address) and password. Add imap.nine.ch as Server, press NEXT to continue.
define outgoing Server
Enter your username (email address) and password. Add smtp.nine.ch as Server, press NEXT to continue.
#define Account Options (optional)
Please press NEXT to continue.
finish up your mail account
Enter a meaningful name and press NEXT to finish the setup.