Disabling noreply@ email
In the Advanced Options menu (Flubaroo > Advanced > Advanced Options) you can choose this option:
If this checkbox is selected, Flubaroo will email grades to students from your own address (i.e. SallySmith@myschool.org), rather than from a default "firstname.lastname@example.org" address.
This is sometimes necessary in some school setups, where noreply@ addresses aren't allowed, or are getting caught in SPAM blockers, etc. You should only need to use this option if none of your students are receiving your emails, and you've confirmed with your IT administrator that this is likely the issue.
Note that any emails sent still apply against your daily email quota, whether this box is checked or not. Also note that this change affects all spreadsheets in your Google Account where you've installed Flubaroo.