diff --git a/src/api/emailClient.ts b/src/api/emailClient.ts
new file mode 100644
index 0000000..47b3bb6
--- /dev/null
+++ b/src/api/emailClient.ts
@@ -0,0 +1,145 @@
+import axios from 'axios';
+import { logger } from '../utils/logger';
+
+// Get API base URL from runtime config (window.env) or build-time config
+// IMPORTANT: Call this function at REQUEST TIME, not at module load time,
+// to ensure window.env is populated by env-config.js
+const getApiBaseUrl = (): string => {
+  // Check window.env first (runtime config from env.sh)
+  if (typeof window !== 'undefined' && window.env?.API_BASE_URL) {
+    return window.env.API_BASE_URL;
+  }
+
+  // Fall back to build-time env or production default
+  return import.meta.env.VITE_API_BASE_URL || 'https://puffinoffset.com/api';
+};
+
+export interface ContactEmailData {
+  name: string;
+  email: string;
+  phone?: string;
+  company?: string;
+  message: string;
+}
+
+export interface ReceiptEmailData {
+  customerEmail: string;
+  orderDetails: {
+    tons: number;
+    portfolioId: number;
+    baseAmount: number;
+    processingFee: number;
+    totalAmount: number;
+    orderId: string;
+    stripeSessionId: string;
+  };
+}
+
+export interface AdminNotificationData {
+  orderDetails: {
+    tons: number;
+    portfolioId: number;
+    totalAmount: number;
+    orderId: string;
+  };
+  customerEmail: string;
+}
+
+export interface EmailResponse {
+  success: boolean;
+  messageId: string;
+  message: string;
+  skipped?: boolean;
+}
+
+/**
+ * Send contact form email to admin
+ * @param data Contact form data
+ * @returns Email response with message ID
+ */
+export async function sendContactEmail(data: ContactEmailData): Promise<EmailResponse> {
+  try {
+    const apiBaseUrl = getApiBaseUrl();
+    logger.info('Sending contact form email:', { name: data.name, email: data.email });
+    logger.info('Using API base URL:', apiBaseUrl);
+
+    const response = await axios.post<EmailResponse>(
+      `${apiBaseUrl}/api/email/contact`,
+      data
+    );
+
+    logger.info('Contact email sent successfully:', response.data.messageId);
+    return response.data;
+  } catch (error) {
+    if (axios.isAxiosError(error)) {
+      logger.error('Contact email failed:', error.response?.data || error.message);
+      throw new Error(error.response?.data?.error || 'Failed to send contact form');
+    }
+    throw error;
+  }
+}
+
+/**
+ * Send receipt email to customer
+ * @param data Receipt email data with order details
+ * @returns Email response with message ID
+ */
+export async function sendReceiptEmail(data: ReceiptEmailData): Promise<EmailResponse> {
+  try {
+    const apiBaseUrl = getApiBaseUrl();
+    logger.info('Sending receipt email to:', data.customerEmail);
+    logger.info('Order ID:', data.orderDetails.orderId);
+
+    const response = await axios.post<EmailResponse>(
+      `${apiBaseUrl}/api/email/receipt`,
+      data
+    );
+
+    logger.info('Receipt email sent successfully:', response.data.messageId);
+    return response.data;
+  } catch (error) {
+    if (axios.isAxiosError(error)) {
+      logger.error('Receipt email failed:', error.response?.data || error.message);
+      throw new Error(error.response?.data?.error || 'Failed to send receipt email');
+    }
+    throw error;
+  }
+}
+
+/**
+ * Send admin notification for new order
+ * @param data Admin notification data
+ * @returns Email response with message ID
+ */
+export async function sendAdminNotification(
+  data: AdminNotificationData
+): Promise<EmailResponse> {
+  try {
+    const apiBaseUrl = getApiBaseUrl();
+    logger.info('Sending admin notification for order:', data.orderDetails.orderId);
+
+    const response = await axios.post<EmailResponse>(
+      `${apiBaseUrl}/api/email/admin-notify`,
+      data
+    );
+
+    if (response.data.skipped) {
+      logger.info('Admin notification skipped (disabled in config)');
+    } else {
+      logger.info('Admin notification sent successfully:', response.data.messageId);
+    }
+    return response.data;
+  } catch (error) {
+    if (axios.isAxiosError(error)) {
+      logger.error('Admin notification failed:', error.response?.data || error.message);
+      // Don't throw - admin notifications should not block user experience
+      logger.warn('Admin notification failure is non-fatal, continuing...');
+      return {
+        success: false,
+        messageId: '',
+        message: 'Admin notification failed (non-fatal)',
+      };
+    }
+    throw error;
+  }
+}
diff --git a/src/components/Contact.tsx b/src/components/Contact.tsx
index 633e369..bd012de 100644
--- a/src/components/Contact.tsx
+++ b/src/components/Contact.tsx
@@ -1,6 +1,6 @@
 import React, { useState } from 'react';
 import { Mail, Phone, Loader2, AlertCircle } from 'lucide-react';
-import { validateEmail, sendFormspreeEmail } from '../utils/email';
+import { validateEmail, sendContactFormEmail } from '../utils/email';
 import { analytics } from '../utils/analytics';
 
 export function Contact() {
@@ -26,8 +26,8 @@ export function Contact() {
         throw new Error('Please enter a valid email address');
       }
 
-      // Send via Formspree
-      await sendFormspreeEmail(formData, 'contact');
+      // Send via SMTP backend
+      await sendContactFormEmail(formData, 'contact');
       
       setSubmitted(true);
       analytics.event('contact', 'form_submitted');
diff --git a/src/components/MobileOffsetOrder.tsx b/src/components/MobileOffsetOrder.tsx
index 03de30b..0beded2 100644
--- a/src/components/MobileOffsetOrder.tsx
+++ b/src/components/MobileOffsetOrder.tsx
@@ -5,7 +5,7 @@ import { createOffsetOrder, getPortfolios } from '../api/wrenClient';
 import type { OffsetOrder as OffsetOrderType, Portfolio, OffsetProject } from '../types';
 import { currencies, formatCurrency } from '../utils/currencies';
 import { config } from '../utils/config';
-import { sendFormspreeEmail } from '../utils/email';
+import { sendContactFormEmail } from '../utils/email';
 import { RadialProgress } from './RadialProgress';
 import { PortfolioDonutChart } from './PortfolioDonutChart';
 import { getProjectColor } from '../utils/portfolioColors';
@@ -248,7 +248,7 @@ export function MobileOffsetOrder({ tons, monetaryAmount, onBack }: Props) {
             e.preventDefault();
             setLoading(true);
             try {
-              await sendFormspreeEmail(formData, 'offset');
+              await sendContactFormEmail(formData, 'contact');
               setSuccess(true);
               setCurrentStep('confirmation');
             } catch (err) {
diff --git a/src/components/OffsetOrder.tsx b/src/components/OffsetOrder.tsx
index 8032af6..fa518b7 100644
--- a/src/components/OffsetOrder.tsx
+++ b/src/components/OffsetOrder.tsx
@@ -6,7 +6,7 @@ import { createCheckoutSession } from '../api/checkoutClient';
 import type { OffsetOrder as OffsetOrderType, Portfolio, OffsetProject } from '../types';
 import { currencies, formatCurrency } from '../utils/currencies';
 import { config } from '../utils/config';
-import { sendFormspreeEmail } from '../utils/email';
+import { sendContactFormEmail } from '../utils/email';
 import { logger } from '../utils/logger';
 import { FormInput } from './forms/FormInput';
 import { FormTextarea } from './forms/FormTextarea';
@@ -247,7 +247,7 @@ export function OffsetOrder({ tons, monetaryAmount, onBack, calculatorType }: Pr
               e.preventDefault();
               setLoading(true);
               try {
-                await sendFormspreeEmail(formData, 'offset');
+                await sendContactFormEmail(formData, 'contact');
                 setSuccess(true);
               } catch (err) {
                 setError('Failed to send request. Please try again.');
diff --git a/src/utils/config.ts b/src/utils/config.ts
index ca40bf0..4d45156 100644
--- a/src/utils/config.ts
+++ b/src/utils/config.ts
@@ -1,7 +1,5 @@
 interface Config {
   wrenApiKey: string;
-  formspreeContactId: string;
-  formspreeOffsetId: string;
   isProduction: boolean;
 }
 
@@ -31,14 +29,10 @@ const getEnv = (key: string): string => {
 
 // Load environment variables
 const wrenApiKey = getEnv('VITE_WREN_API_TOKEN');
-const formspreeContactId = getEnv('VITE_FORMSPREE_CONTACT_ID');
-const formspreeOffsetId = getEnv('VITE_FORMSPREE_OFFSET_ID');
 
 // Initialize config
 export const config: Config = {
   wrenApiKey: wrenApiKey || '',
-  formspreeContactId: formspreeContactId || 'xkgovnby',
-  formspreeOffsetId: formspreeOffsetId || 'xvgzbory',
   isProduction: import.meta.env.PROD === true
 };
 
diff --git a/src/utils/email.ts b/src/utils/email.ts
index 7bbe506..7bd499d 100644
--- a/src/utils/email.ts
+++ b/src/utils/email.ts
@@ -1,4 +1,5 @@
 import { analytics } from './analytics';
+import { sendContactEmail, type ContactEmailData } from '../api/emailClient';
 
 interface EmailData {
   name: string;
@@ -14,7 +15,7 @@ export function validateEmail(email: string): boolean {
 }
 
 export function formatEmailContent(data: EmailData, type: 'contact' | 'offset'): { subject: string, body: string } {
-  const subject = type === 'contact' 
+  const subject = type === 'contact'
     ? `Contact from ${data.name} - Puffin Offset`
     : `Offset Request - ${data.name}`;
 
@@ -36,32 +37,22 @@ export function sendEmail(to: string, subject: string, body: string): void {
   window.location.href = mailtoUrl;
 }
 
-export async function sendFormspreeEmail(data: EmailData, type: 'contact' | 'offset'): Promise<void> {
-  const FORMSPREE_CONTACT_ID = 'xkgovnby';  // Contact form
-  const FORMSPREE_OFFSET_ID = 'xvgzbory';   // Offset request form
-  
-  const formId = type === 'contact' ? FORMSPREE_CONTACT_ID : FORMSPREE_OFFSET_ID;
-  
+/**
+ * Send contact form email via SMTP backend
+ * @param data Contact form data
+ * @param type Email type (contact or offset) - currently only 'contact' is supported
+ */
+export async function sendContactFormEmail(data: EmailData, type: 'contact' | 'offset' = 'contact'): Promise<void> {
   try {
-    const response = await fetch(`https://formspree.io/f/${formId}`, {
-      method: 'POST',
-      headers: {
-        'Content-Type': 'application/json',
-        'Accept': 'application/json'
-      },
-      body: JSON.stringify({
-        ...data,
-        _subject: type === 'contact' 
-          ? `Contact from ${data.name} - Puffin Offset`
-          : `Offset Request - ${data.name}`
-      }),
-    });
-
-    if (!response.ok) {
-      const errorData = await response.json();
-      throw new Error(errorData.error || 'Failed to send message');
-    }
+    const contactData: ContactEmailData = {
+      name: data.name,
+      email: data.email,
+      phone: data.phone,
+      company: data.company,
+      message: data.message,
+    };
 
+    await sendContactEmail(contactData);
     analytics.event('email', 'sent', type);
   } catch (error) {
     analytics.error(error as Error, 'Email sending failed');
diff --git a/src/vite-env.d.ts b/src/vite-env.d.ts
index 34b07e2..93030bc 100644
--- a/src/vite-env.d.ts
+++ b/src/vite-env.d.ts
@@ -2,8 +2,6 @@
 
 interface ImportMetaEnv {
   readonly VITE_WREN_API_TOKEN: string;
-  readonly VITE_FORMSPREE_CONTACT_ID: string;
-  readonly VITE_FORMSPREE_OFFSET_ID: string;
   readonly PROD: boolean;
   readonly DEV: boolean;
   // Add index signature for dynamic access
@@ -19,7 +17,5 @@ interface Window {
   env?: {
     [key: string]: string | undefined;
     WREN_API_TOKEN?: string;
-    FORMSPREE_CONTACT_ID?: string;
-    FORMSPREE_OFFSET_ID?: string;
   };
 }