How do I change the email address from which the confirmation emails are sent?

Bobclass uses the standard email functionality of your device so you'd need to go to the iOS settings of the device to be change the email address:

• iOS Settings > Mail > Default Account
• Select the email account that you want to use

If you do not see any email accounts here, then that means that you did not define any yet on your device. In that case follow these steps:

• iOS Settings > Accounts & Passwords > Add Account
• Select the type of account that you want to add, etc.

Once the account was created, you should test it using the default Mail app that comes with your device. It is the app with the envelope icon. If you are able to send emails from that app, you will also be able to send emails from Bobclass. If you cannot find the Mail app, then it was probably deleted and you must reinstall it.