you are having candidates's resumes in your mailbox, you can use
out add-ins to import the resumes directly to the database. You
just need to install this add-in into your chrome browser. After
installation, it will ask for the user name and password for the
first time. You can use the import button to import a particular CV
from the mail. You can uncheck the cover letters and other
documents if you do not want those documents in the database.
Outlook 365 & Desktop Imports
You can use the add-in for Outlook mailbox. In the case of using Outlook, you can have different add-ins for Outlook Desktop (Cloud) and Outlook 365.
Same way in Gmail, you can use the add-in for Gmail mailbox. You can import the individual attachments or all attachments. Even if you wish to import resumes from multiple mailboxes in one go, you can do it very well.