If you (or your users) are not getting the quotes by email, then it could be a few reasons. Below we will teach you how to fix this very quickly.
Try removing the banner and logo images from your global settings menu. A bad image might be preventing the email functionality from working.
We recommend using your own email server SMTP to deliver the emails. Use your SMTP program to send yourself a test email. More details here (ultimate email setup guide)
Do you have the correct PHP modules installed? Check the SCC diagnostic screen and settle anything in red with your hosting company, web developer or system admin.