Mail for Windows 10 has a powerful search option that makes looking for information in your email fast and reliable.
To search for information in an email message
Press Ctrl+E to move directly to the Search box.
Type a key word in the Search box, such as a word that might be in the Subject line or a recipient's name, and then press Enter.
Mail for Windows 10 places the search results in the message list, and moves the keyboard focus there. You can move through the items in the message list to review the results to find the item you want.
When you find a message you want to open, press Enter.