Currently Being ModeratedNov 14, 2012 8:36 AM (in response to Sharon Chard-Yaron)
Somebody probably used your e-mail address as the sender address when they sent it from a different account. It's not difficult to do with the right software. It's highly unlikely you're hacked, it's just annoying. Change your password just to be safe.
Currently Being ModeratedNov 14, 2012 8:49 AM (in response to Sharon Chard-Yaron)
Whatever your Mac's Mail sent will be in its "Sent" folder.
If your Mac sent it, it's there. If not, it's not.
As Limnos said spoofing your "from" address is trivial, and you will receive the bounced emails since the spam sender fraudulently identified you as the source. You did nothing to cause this other than to have sent an email to someone whose Windows computer was pressed into service as a "bot" or whose Outlook address book's contents were harvested. There is not much else you can do about this other than to use an email account with server-side spam protection such as iCloud uses. Gmail and similar mail servers employ similar anti-spam measures.
As you already learned Norton will not help with this or anything else for that matter. It is likely to cause other, unrelated problems.
Currently Being ModeratedNov 14, 2012 8:57 AM (in response to Sharon Chard-Yaron)
Sharon Chard-Yaron wrote:
John-- thanks.. can you explain what is server-side-spam protection?
Basically, it is software that resides on an email server to intelligently identify and eradicate spam before it ever reaches you. I don't know what Earthlink uses, if any. If they do not, or if it is ineffective, the account will eventually become clogged with spam, either sent from you (apparently) or sent to you.
For example, in the distant past I used Yahoo mail. It rapidly became completely useless because they did not incorporate any spam protection. It rapidly became so burdened with spam that I had no choice but to abandon the account. 1000+ spam messages every day.
Yahoo has improved markedly since then, but of course we have better options now.