MFA fix, added IP blacklist, update webmail client

internal/webui/templates/sidebar_email.html

@@ -86,6 +86,22 @@
                     </a>
                 </li>
 
+                {{if dget . "is_global_admin"}}
+                <li class="nav-item mb-2">
+                    <h6 class="text-muted text-uppercase small mb-2 mt-3">
+                        <i class="bi bi-shield-lock me-1"></i>
+                        Security
+                    </h6>
+                </li>
+                <li class="nav-item mb-1">
+                    <a href="/pymta-manager/blacklist" class="nav-link text-white {{if eq (dget . "active") "blacklist"}}active{{end}}">
+                        <i class="bi bi-shield-x me-2"></i>
+                        Blacklist
+                        <span class="badge bg-secondary ms-auto">{{dget . "blacklist_count"}}</span>
+                    </a>
+                </li>
+                {{end}}
+
                 <li class="nav-item mb-2">
                     <h6 class="text-muted text-uppercase small mb-2 mt-3">
                         <i class="bi bi-gear me-1"></i>