Feature Idea: Enhanced Email and Invoice Management

1. Multiple Email Addresses:

   • Allow adding multiple email addresses to a customer account.
   • When sending an email, it will automatically be sent to all listed email addresses.

2. Automated Follow-Up Emails:

   • Implement an automated system to send follow-up emails for invoices:
     • 7 days before the due date
     • 3 days before the due date
     • On the due date
     • After the due date
     • 3 days after the due date

3. Overdue Invoice Management:

   • Categorize invoices as overdue once they pass the due date.
   • Provide a dedicated page or filter option to easily view and manage overdue invoices.