I don't even care. I just select all and delete. I don't even look for anything that might not be spam.
I have a kind of funny story about spam at an old job.
I used to be sort of like a bill collector, except I called people that didn't have car insurance for cars whose loans we carried. Well, one guy was particularly immature and invited me to something called "Hi5." I declined the invite but ever since then I got some spam at my work e-mail. (Side note: Our work e-mail spam blocker sucked. It didn't use Bayesian filtering and instead used the ancient technique of simply white and blacklists)
The spams I got were generally graphic in nature: strap-on dildos and whatnot... Pictures of people wearing them and all. Every time I got one, I blacklisted the sender's e-mail, but it doesn't matter. People only use an e-mail address called "6x382y2bz@yahoo.com" once, you know?
So anyway, fast-forward to when I resigned the position. It was kind of an ugly departure. I hated my boss and she hated me but I did everything by-the-book and was very professional so it doesn't reflect poorly on me. On my exit interview, I was very honest in describing why I thought my boss actually hurt the company and the department in particular by utterly destroying morale and focusing on secondary and tertiary goals rather than primary goals. These exit interview documents are shared with the CEO, President, VP, and manager.
Anyway, I used e-mail quite a bit in my job to get in contact with some of these people, and I was awaiting quite a few responses via e-mail by the time I left. So I went ahead and created a rule that automatically forwarded e-mail sent to me to the department e-mail distribution list as well as a response to the sender saying to use the department e-mail address in the future to correspond with the company regarding insurance. I created an exception so that e-mail sent to me by my girlfriend would just get forwarded to my home address and then deleted.
The last thing I did before I left was turn on this rule. The next day, I checked my work e-mail through OWA and saw that I had received several e-mails, all spam. They were all those ones with bad pictures.
I still knew people that worked there, and the word was that my boss was telling people that I purposely set up something to send these dirty e-mails to everyone in the department after I left until my account was disabled.
Honestly, it was just by chance that it happened, but I thought it was pretty funny that something I did to try to help out the department actually ended up just sending a bunch of pornographic spams.