diff --git a/Global_Indexer/ClassEmailHeaderExtractor.vb b/Global_Indexer/ClassEmailHeaderExtractor.vb
index b7f82e2..6dcad1d 100644
--- a/Global_Indexer/ClassEmailHeaderExtractor.vb
+++ b/Global_Indexer/ClassEmailHeaderExtractor.vb
@@ -63,7 +63,7 @@ Public Class ClassEmailHeaderExtractor
             End If
             ' einen Regulären Ausdruck laden
             Dim strRegex As String = Regex
-            Dim myRegex As New Regex(strRegex, RegexOptions.IgnorePatternWhitespace)
+            Dim myRegex As New Regex(strRegex, RegexOptions.IgnorePatternWhitespace Or RegexOptions.IgnoreCase)
             Dim strTargetString As String = messageHeaders.Trim
             ' die Vorkommen im String auslesen
             For Each myMatch As Match In myRegex.Matches(strTargetString)