Open the CSV file in Notepad or Excel and look at the field names at the top of the file. In most cases, if the field names aren't the same as Outlook uses, you need to tell Outlook which fields to match. If it can't match the fields, it won’t import them.
When Outlook imports, the fields names in your file need to match Outlook’s field names. That the addresses aren't importing but the names are tells me that Outlook didn't import the addresses because the field names in your CSV don't match with the field names in Outlook. Outlook will import the names, but not the email addresses.
So, if you really want to convert your MSG address book files accurately then we suggest you opt for the automated solution over the manual method.I’ve attempted several times to import my address list without any success. In the preceding sections, we have explicated the complete way to convert MSG to CSV Outlook 2010 Contacts.
By this, you can easily convert multiple files and also save your time as well as your work productivity.