Name: Your Name (What ever you want)
Email: Your email address is your username
Password: Your your-mail.com account password
Description: your-mail.com
Click Next Button
Hostname: imap.fastmail.com
Username: Your email address is your username
Password: Your your-mail.com account password
Hostname: smtp.fastmail.com
Username: Your email address is your username
Password: Your your-mail.com account password
Click Save Button
Use SSL: Yes
Authentication: Password
Server Port: 993
Use SSL: Yes
Authentication: Password
Server Port: 587
You can login your-mail.com and Signup for your-mail.com new account on your iPhone from here.