If you go to Account Settings >> Routine Emails, you will see the warning here regarding your email setup.
Just click the link “fix this for me” and it will configure emails to send from noreply@quickfile.co.uk. This is the simplest fix. If you still want to send emails from your own address you’d need to setup your SMTP service in QuickFile or add an SPF record. Both these options are explained in more detail here.