
WHen dowloading emails, I see some incoming messages ever so briefly, hear the Outlook bell, then they disappear (in a second flat). They are not in the deleted items or other Outlook folder. I can't find them anywhere and my ISP no longer keeps it on the server once downloaded.
There are a couple of known senders that prompt this disappearance. None of which I have blocked. In the lastest incidents, I sent out an email to a list of people on my address book, including myself. They got it, I didn't. Then they repried and I did not receive the replies - althought if I access them via my phone or through webmail, I get them. So the problem seems to be with the Outlook on the PC.

I wonder whether there's some link with anti-virus threads to my own address.

Thank you so much already!