If your printer is network conected then the first place you should go is the EWS (Embedded Web Server).
To access the EWS:
1. Print off a Configuration Page from your printer
2. Review the network information for the pritners IP Address
3. Type in the IP Address for the printer into a web browser
Once you are signed into your printer you can review the various scan to email options that are available. Everything you need to configure and test scan to email or scan to network folder can be accessed from the EWS assuming you do not have another service managing it for you.
If you are having difficulties reaching a scan folder on your destination computer then review the security for that folder. The folder needs to be open and available for the printer just like any other shared folder on your computer. Try accessing the folder security options and try adding the "everyone" group. Grant "everyone" full permissions and you should be able to scan to that location.