feat: self-hosted postfix

package.json

@@ -27,18 +27,18 @@
     "@radix-ui/react-label": "^2.0.2",
     "@radix-ui/react-slot": "^1.0.2",
     "@vercel/analytics": "^1.1.1",
-    "openai": "^4.77.0",
     "axios": "^1.12.0",
     "class-variance-authority": "^0.7.0",
     "clsx": "^2.0.0",
     "isomorphic-dompurify": "^2.15.0",
     "lucide-react": "^0.460.0",
     "next": "^15.5.9",
+    "nodemailer": "^7.0.12",
+    "openai": "^4.77.0",
     "postcss-nesting": "^12.0.2",
     "react": "^18",
     "react-dom": "^18",
     "react-hook-form": "^7.48.2",
-    "resend": "^3.1.0",
     "tailwind-merge": "^2.1.0",
     "tailwindcss-animate": "^1.0.7",
     "zod": "^3.23.8"
@@ -47,6 +47,7 @@
     "@commitlint/cli": "^18.4.3",
     "@commitlint/config-conventional": "^18.4.3",
     "@types/node": "^20",
+    "@types/nodemailer": "^7.0.5",
     "@types/react": "^18",
     "@types/react-dom": "^18",
     "@typescript-eslint/eslint-plugin": "^6.12.0",