@[deleted] and @[deleted], I don't have a clue if this is Outlook related. Here we use Outlook 2010.I have to emphasize that only some Outlook conversations cause corrupted tickets while most of them are OK.And just that is why I can't figure out what's causing the problem.We use signature in Outlook, so the company logo appears several times in the conversation.Can you test this by using signature with logo for creating email thread/conversation, please?