and ANTI_VIRUS utilities. Anti-Virus and Anti-Malware are NOT the same although they can overlap a little in some areas.
It looks like you may have either allowed some malware aboard your computer that copied your contacts list and sends spam to them or you may simply be unfortunate enough to have someone somewhere spoofing your email address.
Are you sure it is ALL your contacts or is it just a couple of them? The header section of the emails received will show the originating IP address.
Download RKILL and run it. After running it run scans with your ANTI_VIRUS application and with Malware Bytes and do these scans WITHOUT RE-BOOTING after running RKILL. Here is a link to RKILL and info on exactly what it is and what it does and how to use it. READ the info on the link because it tells you about possible "Warnings" that may [pop up on your screen - knowing about them and why they show up will help you avoid heartburn.
to my contacts.
I have Zone Alerm, Superantispyware, Malaware's bytes, Adaware and other security utilies running timely.
How they hack my contacts and what should I do about it?