If you need to create a private email address in Sap My Apps but you don’t have a private email address (from your provider, Google, Hotmail, etc.), you can create one using the following guide.
For creating a Gmail address, we refer to the information from Google itself as this information can change without us having any influence on it. See https://support.google.com/mail/answer/56256?hl=en
If you want to use an email account from MS, the procedure is below (this guide is also subject to changes by MS)
Creating an account Creating an account works like this: Go to login.live.com Click on ‘No account?’ on Create one
Check if it's not in the spam folder of your email client? For Outlook, that would be https://outlook.office.com/mail/junkemail
Also, add the sender to the safe senders list. To do this, go to https://outlook.office.com/mail/ and refer to the attached screenshot on how to proceed. Open a previous email from the sender, click on the three dots on the right ①, then click on Block ②, and choose 'Never block' ③.