Please do not reply to this email
Everyone must have received lots of such messages where at the end they say "Please do not reply to this email". This is idiotic on many accounts. I won't even bother to explain them. I do the exact opposite. In all emails that are generated by applications, I always include a line which says something like " Please reply to this email if you meet any problems. " And of course I use a sender email address that is always monitored.