<h4>Phase 3: Full Email Class Migration — Complete</h4><p>All 18 email classes now route through the centralized <code>EmailService</code>. Zero direct <code>new \SendGrid()</code> send calls remain in any email class.</p><h5>Classes Migrated (16 in this phase):</h5><ul><li>AccountConfirmationEmailClass (4 instances) — signup, password reset, welcome, verified</li><li>shopping_cart.email.class (6 instances) — orders, subscriptions, payments</li><li>ticket_email.class (5 instances) — ticket CRUD, replies, status changes</li><li>PaymentEmailClass (4 instances) — transaction receipts</li><li>reviews.email.class (3 instances) — review submitted, reply</li><li>indexing_email.class (9 instances) — index operations</li><li>payment_email.class (3 instances) — legacy payments</li><li>quote_email.class (3 instances) — RFQ</li><li>platform_services.email.class (1 instance)</li><li>ListingValidationEmailClass (2 instances)</li><li>IwebInviteLogEmailClass (1 instance)</li><li>chat_email.class (1 instance)</li><li>info.class (1 instance)</li><li>mediaLibrary_email.class (1 instance)</li><li>LeadsEmailClass (1 instance)</li><li>sendEmailReminderClass (1 instance)</li></ul><h5>Totals:</h5><ul><li>18 classes migrated (2 in Phase 2 + 16 in Phase 3)</li><li>~65 SendGrid send calls replaced</li><li>19/19 files pass PHP syntax check</li><li>0 remaining direct SendGrid send calls</li></ul><h5>What This Means:</h5><ul><li>Every email on the platform now goes through EmailService</li><li>Every send is logged to email_log with site context</li><li>Sandbox mode auto-activates on .lcl</li><li>Config is per-site via email_config table</li></ul><p><strong>Blocker:</strong> SendGrid API key is IP-blocked (being resolved with SendGrid support). Once unblocked, sandbox mode will return 200 OK on .lcl.</p><p><strong>Next:</strong> Phase 4 (Admin UI) and Phase 5 (Cleanup)</p>