Lately I have been receiving a lot (as many as 20 a day) e-mails which has nothing:
- no sender
- no receipient
- no message

And all that is shown is the time/date (I believe it is the time-stamp on the sender's server).

What are these e-mails ?

I have read something about Outlook that someone can send an e-mail, and before the recipient downloads it, the sender can remove it even if it has been sent already... are these blank e-mails I received of this type ?

I appreciate your help. I post on this Forum because I think they are SPAMS, relating to Computer Security and Viruses.