I logged on today to find I had 12
"Undelivered Mail Returned to Sender" in my yahoo email inbox. Apparently someone called Aleksey sent these emails using my email address which I've blocked out in red and black in the attached pic of 1 of the returned emails.
The emails are not all exactly the same, the host underneath where it says "The SMTP Server program" is different and the "Final-Recipient: rfc822;" are different but they're all .ru addresses.
I'm always very wary of anything russian, just worried maybe 1 of the fuckers has hacked my email or something.