(feat) you can now limit the file upload size using WOMaxUploadSize

UI/MailerUI/UIxMailEditor.m

@@ -590,6 +590,12 @@ static NSArray *infoKeys = nil;
   request = [context request];
 
   httpBody = [[request httpRequest] body];
+
+  // We got an exception from SOPE - most likely due to
+  // WOMaxUploadSize being reached.
+  if ([httpBody isKindOfClass: [NSException class]])
+    return httpBody;
+
   filenames = [self _scanAttachmentFilenamesInRequest: httpBody];
 
   co = [self clientObject];