not sure if this is the right place but pleas re-direct me if not!
I received an email which I am not sure if I am going to reply to- the sender asked if my email address was still the same before writing any more ( it's an old friend so it's not spam).
I am dithering over replying and slightly surprised they haven't tried again....so would they be able to see I've opened and read the email ( they are with bt nternet for emails.)