I am facing with a stupid issue on my part: whenever I receive a message, I always stop at the (lengthy) signature of the sender, and never check whether there is anything after it. This is especially an issue, when they are forwarding a message and start talking about it without specifically stating "underneath" or "in forwarded mail" and I go along with whatever I think the context actually is. It would be clear if there is no context to connect it with, but often a mail is a continuation of a topic in some form, like feedback on a project or a prior issue. Some senders also not using Outlook in English, so "Fwd:" and "Re:" might not appear in the subject, though it might not even help in my case, as I don't read it, and it is possible to remove them—though no one removed them yet.
While obviously I could ask the sender to always clearly point out whenever they are forwarded a mail, I can't really make sure everyone does that, and it may even come through rude for some. I have set up a formatting rule to highlight forwarded mails in my inbox, so when I open the mail, I know I should take extra care to read further the first signature, but it depends on the subject starting in a particular text. Is there any specific way that detects and signals that the mail continues after the signature? I am thinking along the line of listing all the words in the condition the body of the mail may hold that indicates a repeating mail header that is language independent, maybe even a regular expression, or an add-in making a more elaborate and directed check of the mail body that indicates a lengthy "signature" and warns if it is potentially followed by any other text or even remove the signature for viewing.