There was an attachment, however, which always makes me wary. And when I looked into the actual source of the Sender (rather than what it said), it didn't appear to match up. So, I did some searching, and it's close to certain that this is both fake and malicious. Also, it appears to be something that's being sent around. So, I pass this on as a heads-up, in case you receive something similar. If so -- delete it. (Opening it to read should be safe, if you do that by accident, just don't click on the attachments.)
The Subject line is -- "ADP Payroll Invoice for week ending [date of week]
The message is from -- ops_inovice [@] adp.com. (I've fudged the address for security.)
Below, here is some of what I found out from the Cisco Security website --
* * *
Cisco Security Intelligence Operations has detected significant activity related to spam e-mail messages that claim to contain an invoice from ADP Payroll for the recipient. The text in the e-mail message attempts to convince the recipient to open the attachment and view the details. However, the .zip attachment contains a malicious .exe file that, when executed, attempts to infect the user's system with malicious code.
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Subject: ADP Payroll Invoice for week ending 02/08/2013 - 02608
Your ADP payroll invoice for last week is attached for your review. If you have any questions regarding this invoice, please contact your ADP service team at the number provided on the invoice for assistance.
Thanks you for choosing ADP Payroll.
Important: Pleaase do not respond to this message. It comes from an unattended mailbox.