diff --git a/make_post_sell/lib/mail_messages.py b/make_post_sell/lib/mail_messages.py
index 7dab3cf..5117902 100644
--- a/make_post_sell/lib/mail_messages.py
+++ b/make_post_sell/lib/mail_messages.py
@@ -12,11 +12,19 @@ WELCOME_1_HTML = """
 <html>
 <head>
 <title>{0}</title>
+<style>
+  .otp-code {{
+    font-size: 3em;
+    font-weight: bold;
+    letter-spacing: 0.1em;
+    margin: 1em 0;
+  }}
+</style>
 </head>
   <body>
-    <h2>Hey there!</h2>
+    <h1 class="otp-code">{1}</h1>
 
-    <p><b>{1}</b></p>
+    <p>Hey there!</p>
 
     <p>
     Here is the verification code you requested.
