From e79766b87117786404b306889f5b3e5e7b7642a1 Mon Sep 17 00:00:00 2001
From: cketti <cketti@gmail.com>
Date: Wed, 21 Nov 2018 02:35:18 +0100
Subject: [PATCH] Only try to expunge a message if the Backend supports it

---
 .../main/java/com/fsck/k9/controller/MessagingController.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/core/src/main/java/com/fsck/k9/controller/MessagingController.java b/app/core/src/main/java/com/fsck/k9/controller/MessagingController.java
index a8b919021..c69a1471c 100644
--- a/app/core/src/main/java/com/fsck/k9/controller/MessagingController.java
+++ b/app/core/src/main/java/com/fsck/k9/controller/MessagingController.java
@@ -971,7 +971,7 @@ public class MessagingController {
             remoteUidMap = backend.moveMessages(srcFolder, destFolder, uids);
         }
 
-        if (!isCopy && Expunge.EXPUNGE_IMMEDIATELY == account.getExpungePolicy()) {
+        if (!isCopy && backend.getSupportsExpunge() && account.getExpungePolicy() == Expunge.EXPUNGE_IMMEDIATELY) {
             Timber.i("processingPendingMoveOrCopy expunging folder %s:%s", account.getDescription(), srcFolder);
             backend.expungeMessages(srcFolder, uids);
         }