diff --git a/includes/functions.php b/includes/functions.php
index 7a13742..4452d86 100644
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -326,48 +326,36 @@ function getCartTotal() {
 }
 
 /**
- * Send email using SendGrid
+ * Send email via CyberMail API
  */
 function sendEmail($to, $subject, $htmlContent, $textContent = '') {
-    if (empty(SENDGRID_API_KEY)) {
-        return false;
-    }
-    
-    $data = [
-        'personalizations' => [
-            [
-                'to' => [['email' => $to]],
-                'subject' => $subject
-            ]
-        ],
-        'from' => [
-            'email' => SENDER_EMAIL,
-            'name' => SENDER_NAME
-        ],
-        'content' => [
-            ['type' => 'text/html', 'value' => $htmlContent]
-        ]
+    $apiKey = defined('CYBERMAIL_API_KEY') ? CYBERMAIL_API_KEY : '';
+    if (!$apiKey) return false;
+
+    $payload = [
+        'from'    => ['email' => SENDER_EMAIL, 'name' => SENDER_NAME],
+        'to'      => [['email' => $to]],
+        'subject' => $subject,
+        'html'    => $htmlContent,
     ];
-    
-    if ($textContent) {
-        array_unshift($data['content'], ['type' => 'text/plain', 'value' => $textContent]);
-    }
-    
-    $ch = curl_init();
-    curl_setopt($ch, CURLOPT_URL, 'https://api.sendgrid.com/v3/mail/send');
-    curl_setopt($ch, CURLOPT_POST, true);
-    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
-    curl_setopt($ch, CURLOPT_HTTPHEADER, [
-        'Authorization: Bearer ' . SENDGRID_API_KEY,
-        'Content-Type: application/json'
+    if ($textContent) $payload['text'] = $textContent;
+
+    $ch = curl_init('https://platform.cyberpersons.com/email/v1/send');
+    curl_setopt_array($ch, [
+        CURLOPT_RETURNTRANSFER => true,
+        CURLOPT_POST           => true,
+        CURLOPT_POSTFIELDS     => json_encode($payload),
+        CURLOPT_HTTPHEADER     => [
+            'Authorization: Bearer ' . $apiKey,
+            'Content-Type: application/json',
+        ],
+        CURLOPT_TIMEOUT        => 20,
+        CURLOPT_SSL_VERIFYPEER => false,
     ]);
-    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-    
     $response = curl_exec($ch);
     $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
     curl_close($ch);
-    
-    return $httpCode >= 200 && $httpCode < 300;
+    return $httpCode === 202;
 }
 
 /**