I see it is very easy to find email from sender if I type part of the email address of the contact.
mu find contact:address
However, having to remember parts of email addresses is kind of like having to remember phone numbers. It's particularly convenient and it feels pretty backwards for 21st century email use. I know mu has access to the strings corresponding to the real names because it shows them in the headers buffer in mu4e.
Is there some way to search those?