diff --git a/Securcube.ImapDownloader/Data/Downloader.cs b/Securcube.ImapDownloader/Data/Downloader.cs
index 1d2bea8..5f0483e 100644
--- a/Securcube.ImapDownloader/Data/Downloader.cs
+++ b/Securcube.ImapDownloader/Data/Downloader.cs
@@ -348,7 +348,7 @@ private static long DownloadMails(DataContext dc, PcapCapture pcap)
                                    totalMessagesDownloaded++;
                                    folder.DownloadedItems++;
 
-                                   messageIdSafeName = System.Text.RegularExpressions.Regex.Replace(msg.Headers["Message-ID"] + "", "[<>\\/:]", "");
+                                   messageIdSafeName = System.Text.RegularExpressions.Regex.Replace(msg.Headers["Message-ID"] + "", "[|\"<>\\/:]", "");
 
                                    string msgPrefix = item.UniqueId + "";