server: fix NPE in mail processing

1 files changed, 1 insertions, 1 deletions

diff --git a/juick-server/src/main/java/com/juick/server/api/Post.java b/juick-server/src/main/java/com/juick/server/api/Post.java
index 80ebe1a1..72ca8439 100644
--- a/juick-server/src/main/java/com/juick/server/api/Post.java
+++ b/juick-server/src/main/java/com/juick/server/api/Post.java
@@ -212,7 +212,7 @@ public class Post {
     public void processMail(InputStream data) throws Exception {
         MimeMessage msg = new MimeMessage(session, data);
         logger.info("got msg {}", msg.toString());
-        String from = msg.getFrom().length > 1 ? ((InternetAddress) msg.getSender()).getAddress()
+        String from = msg.getFrom() == null || msg.getFrom().length > 1 ? ((InternetAddress) msg.getSender()).getAddress()
                 : ((InternetAddress) msg.getFrom()[0]).getAddress();
 
         User visitor = userService.getUserByEmail(from);