Got a bunch of them today, also. At my Yahoo mail address, no less. Although that is good cause they are never on my machine since I delete them off Yahoo's server without ever downloading.
A useful little utility I use is eprompter. It will check most web mail and just about any ISP based mail for you. It can be set to only get the headers so you can decide if you want to read the messages or not. You can then delete unwanted mail from your mail server from eprompter. It's easy, convenient, and free.