diff --git a/app/src/main/res/layout/fragment_options_synchronize.xml b/app/src/main/res/layout/fragment_options_synchronize.xml
index 2b682294f6..5ff99588e3 100644
--- a/app/src/main/res/layout/fragment_options_synchronize.xml
+++ b/app/src/main/res/layout/fragment_options_synchronize.xml
@@ -757,6 +757,19 @@
                     app:layout_constraintTop_toBottomOf="@id/tvCheckAuthenticationHint"
                     app:switchPadding="12dp" />
 
+                <eu.faircode.email.FixedTextView
+                    android:id="@+id/tvCheckTlsHint"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="12dp"
+                    android:layout_marginEnd="48dp"
+                    android:text="@string/title_advanced_check_tls_hint"
+                    android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                    android:textStyle="italic"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/swCheckTls" />
+
                 <androidx.appcompat.widget.SwitchCompat
                     android:id="@+id/swCheckReply"
                     android:layout_width="0dp"
@@ -766,7 +779,7 @@
                     android:text="@string/title_advanced_check_reply_domain"
                     app:layout_constraintEnd_toEndOf="parent"
                     app:layout_constraintStart_toStartOf="parent"
-                    app:layout_constraintTop_toBottomOf="@id/swCheckTls"
+                    app:layout_constraintTop_toBottomOf="@id/tvCheckTlsHint"
                     app:switchPadding="12dp" />
 
                 <eu.faircode.email.FixedTextView
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index bfc9550a7c..8e8b5528b4 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -731,6 +731,7 @@
     <string name="title_advanced_sync_folders_hint">Disabling this will reduce data and battery usage somewhat, but will disable updating the list of folders too</string>
     <string name="title_advanced_poll_folders_hint">Periodically synchronize the folder list in addition to after connecting to an account</string>
     <string name="title_advanced_check_authentication_hint">This will check the results of DKIM, SPF and DMARC authentication as performed by the email server</string>
+    <string name="title_advanced_check_tls_hint">This will show a green shield only if a messages was transported securely by all servers</string>
     <string name="title_advanced_check_reply_hint">This will check if the domain name of the sender and the reply address are the same</string>
     <string name="title_advanced_lookup_mx_hint">This will check if DNS MX records exist</string>
     <string name="title_advanced_sync_delay_hint">This will slow down synchronizing messages</string>