You can use your IONOS email account with any email program. In this article, you can find the instructions to help you set up some of the most popular email clients.
Customers with Microsoft Exchange can find instructions here:
Setup on Smartphone or Tablet
If you use IONOS Webmail to access your email right from your browser, no setup is required. Webmail is already set up to manage your email account.
Go to the Webmail Login
Server Details for IMAP, POP3, and SMTP
If you need the data from the IONOS email servers, please read the following article: Settings For Your Email Programs (IMAP & POP3)