With Kutools for Outlook’s This Contact utility, you just need to navigate to the Contacts (In Outlook 2010) or People (In Outlook 2013) and specify a contact that you want to select all emails, then please apply this utility.

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1. Please go to the People (or Contact) view, and select a contact which you want to search all emails by this contact. See screenshot:

2. Then please apply this utility by clicking Kutools > Search > This Contact. See screenshot:

3. After clicking This Contact, the contact’s email address will be automatically added to the Instant Search box, and all emails related to this contact are found out and listed in the mail list.

Note: "This is not a Contact folder!", it means you need to navigate to the People (or Contact) view firstly.