feat: integrate free email domain validation in contact forms

- Added the `free-email-domains` package to validate email addresses in the contact forms.
- Implemented checks to reject free email providers for sales inquiries in both the API and UI components.
- Updated the `pnpm-lock.yaml` and `package.json` files to include the new dependency.

Author: Siumauricio

apps/website/app/api/contact/route.ts

@@ -4,6 +4,8 @@ import type { NextRequest } from "next/server";
 import { NextResponse } from "next/server";
 import { Resend } from "resend";
 
+const FREE_EMAIL_DOMAINS: Set<string> = new Set(require("free-email-domains"));
+
 interface ContactFormData {
 	inquiryType: "support" | "sales";
 	firstName: string;
@@ -52,6 +54,17 @@ export async function POST(request: NextRequest) {
 			);
 		}
 
+		// Reject free email providers for sales inquiries
+		if (body.inquiryType === "sales") {
+			const domain = body.email.split("@")[1]?.toLowerCase();
+			if (domain && FREE_EMAIL_DOMAINS.has(domain)) {
+				return NextResponse.json(
+					{ error: "Please use your work email address to contact sales" },
+					{ status: 400 },
+				);
+			}
+		}
+
 		// Submit to HubSpot if it's a sales inquiry
 		if (body.inquiryType === "sales") {
 			try {

apps/website/components/ContactForm.tsx

@@ -12,6 +12,8 @@ import {
 } from "@/components/ui/select";
 import { useState } from "react";
 
+const FREE_EMAIL_DOMAINS: Set<string> = new Set(require("free-email-domains"));
+
 interface ContactFormData {
 	inquiryType: "" | "support" | "sales";
 	deploymentType: "" | "cloud" | "self-hosted";
@@ -69,6 +71,12 @@ export function ContactForm({
 			newErrors.email = "Email is required";
 		} else if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(formData.email)) {
 			newErrors.email = "Please enter a valid email address";
+		} else if (
+			formData.inquiryType === "sales" &&
+			FREE_EMAIL_DOMAINS.has(formData.email.split("@")[1]?.toLowerCase())
+		) {
+			newErrors.email =
+				"Please use your work email address to contact sales";
 		}
 		if (!formData.company.trim()) {
 			newErrors.company = "Company name is required";

apps/website/package.json

@@ -35,6 +35,7 @@
 		"class-variance-authority": "^0.7.0",
 		"clsx": "^2.1.0",
 		"framer-motion": "^11.3.19",
+		"free-email-domains": "^1.2.26",
 		"hast-util-to-jsx-runtime": "^2.3.5",
 		"lucide-react": "0.364.0",
 		"next": "16.1.5",