I have recently received a couple of these notices but they were for e-mails I never sent and to addresses I do not recognize. Has my account been hijacked to send e-mails or is this another form of phishing? I changed my password today.
Your account is most likely in your full control. The people who send junk mail for Viagra and Breast Enhancers - I always get confused by their statements and think I may need both - take legitimate email addresses and use them as the return address when doing their bulk mailings. They do this to get their messages through corporate email filters who block the emails from a known list of spammer's addresses.
John