Karen - thanks for the warning.

Yesterday I only sent out 1 email in the morning. When I came home from work there were 4 suspicious emails about "Mail transaction failed" - all with attachments. I immediately deleted them without opening. Two of them looked kind of official and looked exactly alike. The other two were each different and really looked suspicious. Since I got 4 right in a row, it looked like a typical spam type email like I've been getting on other topices like stocks, mortgages, prescriptions, etc.

I just did a full scan on my computer and no viruses were found.