A company I use is sending me emails that I'm rarely getting. I do get the occasional one, but most don't get through. If I email them my messages (usually with attachments) are flagged up as potentially dangerous (!) but they are received. When their IT people check what I've sent there's absolutely no problem. Occasionally their messages are sent to my Spam folder, but not always. I've noticed that they are signed by gappssmpt.com (several different individual senders). It's Gmail using the web interface. Any idea what's going on? I've checked all my folders, including All Mail and Trash, and they're not there. All my other mail is getting through normally. As an experiment I asked them to send a message to my wife's email (BT) and that never arrived either. I suspect that the issue is at their end.