Add auto-discovery SMTP testing, unencrypted support, and BCT branding

index.html

@@ -34,6 +34,19 @@
           <p class="subtitle">
             Advanced SMTP Configuration & Delivery Testing Utility
           </p>
+          <a
+            href="https://www.youtube.com/@beyondcloudtechnology"
+            target="_blank"
+            rel="noopener noreferrer"
+            class="youtube-link"
+          >
+            <svg class="youtube-icon" viewBox="0 0 24 24" fill="currentColor">
+              <path
+                d="M23.498 6.186a3.016 3.016 0 0 0-2.122-2.136C19.505 3.545 12 3.545 12 3.545s-7.505 0-9.377.505A3.017 3.017 0 0 0 .502 6.186C0 8.07 0 12 0 12s0 3.93.502 5.814a3.016 3.016 0 0 0 2.122 2.136c1.871.505 9.376.505 9.376.505s7.505 0 9.377-.505a3.015 3.015 0 0 0 2.122-2.136C24 15.93 24 12 24 12s0-3.93-.502-5.814zM9.545 15.568V8.432L15.818 12l-6.273 3.568z"
+              />
+            </svg>
+            Watch on YouTube @beyondcloudtechnology
+          </a>
         </div>
       </header>
 
@@ -73,6 +86,7 @@
                 <select id="secure" name="secure">
                   <option value="false">STARTTLS (587/25)</option>
                   <option value="true">SSL/TLS (465)</option>
+                  <option value="none">Unencrypted (No TLS)</option>
                 </select>
               </div>
 
@@ -134,6 +148,10 @@
                 <span class="btn-text">Test Configuration & Send Email</span>
                 <div class="loading-spinner hidden"></div>
               </button>
+              <button type="button" class="btn btn-secondary" id="autoTestBtn">
+                <span class="btn-text">🔍 Auto Discovery Test</span>
+                <div class="loading-spinner hidden"></div>
+              </button>
             </div>
 
             <!-- Warning for Password Transmission -->