--- sope-mime/NGMime/NGMimeMultipartBodyGenerator.m.orig	2019-12-17 20:34:06.000000000 +0000
+++ sope-mime/NGMime/NGMimeMultipartBodyGenerator.m	2020-09-25 18:50:50.850010659 +0000
@@ -206,7 +206,7 @@
   }
   [data appendBytes:"--" length:2];
   [data appendBytes:[_boundary cString] length:[_boundary length]];
-  [data appendBytes:"--\r\n" length:4];
+  [data appendBytes:"--" length:2];
   return data;
 }