diff --git a/files/header_checks b/files/header_checks
index 8914233..d553c14 100644
--- a/files/header_checks
+++ b/files/header_checks
@@ -1,5 +1,4 @@
-/^Received:.*with ESMTPSA/	 	IGNORE
-/^X-Originating-IP:/    		IGNORE
-/^X-Mailer:/            		IGNORE
-/^User-Agent:/					IGNORE
-/^Mime-Version:/        		IGNORE
\ No newline at end of file
+/^Received:.*with ESMTPSA/      IGNORE
+/^X-Originating-IP:/            IGNORE
+/^X-Mailer:/                    IGNORE
+/^User-Agent:/                  IGNORE