diff --git a/FAQ.md b/FAQ.md
index 6b28b4893f..ed5229c608 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -3532,6 +3532,10 @@ please see [here](https://github.com/disconnectme/disconnect-tracking-protection
 Permanent deletion means that messages will *irreversibly* be lost, and to prevent this from happening accidentally, this always needs to be confirmed.
 Even with a confirmation, some very angry people who lost some of their messages through their own fault contacted me, which was a rather unpleasant experience :-(
 
+Note that the POP3 protocol can download messages from the inbox only.
+So, deleted messages cannot be uploaded to the inbox again.
+This means that messages can only be permanently deleted when using a POP3 account.
+
 Advanced: the IMAP delete flag in combination with the EXPUNGE command is not supportable
 because both email servers and not all people can handle this, risking unexpected loss of messages.
 A complicating factor is that not all email servers support [UID EXPUNGE](https://tools.ietf.org/html/rfc4315).
diff --git a/app/src/main/java/eu/faircode/email/FragmentDialogAsk.java b/app/src/main/java/eu/faircode/email/FragmentDialogAsk.java
index 3d4b35868a..ded54e0ea3 100644
--- a/app/src/main/java/eu/faircode/email/FragmentDialogAsk.java
+++ b/app/src/main/java/eu/faircode/email/FragmentDialogAsk.java
@@ -30,6 +30,7 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.CheckBox;
 import android.widget.CompoundButton;
+import android.widget.ImageButton;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
@@ -47,6 +48,7 @@ public class FragmentDialogAsk extends FragmentDialogBase {
         String confirm = args.getString("confirm");
         String notagain = args.getString("notagain");
         boolean warning = args.getBoolean("warning");
+        int faq = args.getInt("faq");
 
         final Context context = getContext();
         final int colorError = Helper.resolveColor(context, R.attr.colorError);
@@ -56,6 +58,7 @@ public class FragmentDialogAsk extends FragmentDialogBase {
         TextView tvRemark = dview.findViewById(R.id.tvRemark);
         CheckBox cbConfirm = dview.findViewById(R.id.cbConfirm);
         CheckBox cbNotAgain = dview.findViewById(R.id.cbNotAgain);
+        ImageButton ibInfo = dview.findViewById(R.id.ibInfo);
 
         tvMessage.setText(question);
         tvRemark.setText(remark);
@@ -63,6 +66,7 @@ public class FragmentDialogAsk extends FragmentDialogBase {
         cbConfirm.setText(confirm);
         cbConfirm.setVisibility(confirm == null ? View.GONE : View.VISIBLE);
         cbNotAgain.setVisibility(notagain == null ? View.GONE : View.VISIBLE);
+        ibInfo.setVisibility(faq == 0 ? View.GONE : View.VISIBLE);
 
         if (warning) {
             Drawable w = context.getDrawable(R.drawable.twotone_warning_24);
@@ -81,6 +85,14 @@ public class FragmentDialogAsk extends FragmentDialogBase {
                 }
             });
 
+        if (faq != 0)
+            ibInfo.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    Helper.viewFAQ(v.getContext(), faq);
+                }
+            });
+
         return new AlertDialog.Builder(getContext())
                 .setView(dview)
                 .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
diff --git a/app/src/main/java/eu/faircode/email/FragmentMessages.java b/app/src/main/java/eu/faircode/email/FragmentMessages.java
index 33faef493b..8f69d0de99 100644
--- a/app/src/main/java/eu/faircode/email/FragmentMessages.java
+++ b/app/src/main/java/eu/faircode/email/FragmentMessages.java
@@ -3353,6 +3353,7 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                         .getQuantityString(R.plurals.title_deleting_messages, ids.size(), ids.size()));
                 if (!pop && !EntityFolder.TRASH.equals(type) && !EntityFolder.JUNK.equals(type))
                     aargs.putString("confirm", getString(R.string.title_no_undo));
+                aargs.putInt("faq", 160);
                 aargs.putLongArray("ids", Helper.toLongArray(ids));
                 aargs.putBoolean("warning", true);
 
@@ -3734,6 +3735,7 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                 aargs.putString("question", getResources()
                         .getQuantityString(R.plurals.title_deleting_messages, ids.size(), ids.size()));
                 aargs.putString("remark", getString(R.string.title_no_undo));
+                aargs.putInt("faq", 160);
                 aargs.putLongArray("ids", Helper.toLongArray(ids));
                 aargs.putBoolean("warning", true);
 
diff --git a/app/src/main/res/layout/dialog_ask_again.xml b/app/src/main/res/layout/dialog_ask_again.xml
index 3e015871c4..00194044d8 100644
--- a/app/src/main/res/layout/dialog_ask_again.xml
+++ b/app/src/main/res/layout/dialog_ask_again.xml
@@ -51,5 +51,18 @@
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/cbConfirm" />
+
+        <ImageButton
+            android:id="@+id/ibInfo"
+            android:layout_width="36dp"
+            android:layout_height="36dp"
+            android:background="?android:attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/title_info"
+            android:padding="6dp"
+            android:scaleType="fitCenter"
+            android:tooltipText="@string/title_info"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/cbNotAgain"
+            app:srcCompat="@drawable/twotone_info_24" />
     </androidx.constraintlayout.widget.ConstraintLayout>
 </eu.faircode.email.ScrollViewEx>
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