Okay - so the sender's ip address (launching server) is in Israel so it's not from your machine and you haven't been hacked (no malware sending out emails from your machine)
You can try reporting abuse to:
Looks like it's probably sent from a machine that's been compromised and is part of a botnet. If there's nothing in your sent messages folder it just looks like your email has been spoofed and someone's contact list (not necessarily yours) has been compromised.
All you can really do is warn your contacts, report the problem to the hoster and hope that the botnet gets taken down.
Have a read through this:
Spam from your friends: spoofed and hacked e-mail