Is there a way to add reservations from several email addresses?

Yes. You can add up to two secondary email addresses to your Sam account. To add a secondary email address, open the “Options” menu, section “About me” then tap on “Basic info” and select “Add new email”. Type it in the appropriate text fields. After saving you will receive an email with a link to confirm this new email address. Make sure you confirm each email address to start using it.