My WordPress site, hosted on Hostinger, has suddenly stopped sending any system-generated emails—new user registrations, contact form notifications, order confirmations, everything. I haven’t changed themes, plugins, or server settings, so the problem isn’t tied to a recent update. I need someone who can quickly diagnose the root cause, configure the proper SMTP or other reliable mail method, run test sends, and confirm that every core email function works again. Deliverables (all must be met): • Identify and resolve the sending failure so WordPress dispatches emails reliably. • Verify successful delivery for registration, contact form, and order confirmation messages. • Provide a short, clear summary of what was fixed or configured so I can keep it working in the future.