If you are using a web browser to log read your emails you need to log on to your email account. Set up and name the folder that you want the emails to go to. Then go to the settings, found by clicking on your user name at the top right.
Go to Mail then to Rules. Click on that. Click on Add. Name the rule then work your way through the relevant boxes adding the parameters that you want then click save.
Any email that meets the parameters that you set will now go to the folder that you set up.
The same applies if you are using an email client although there may be some slight differences in the actual names/settings.