Receiving lots of junk mail may be a problem if you don't have an anti-spam filter of sorts to help you out. But do you need one? What if all you want is the ability to choose which emails you want to receive to your computer before downloading them? nPOP is a free and simple utility to assist you in that.
     nPOP is an email utility which main feature is the ability to download message headers from your mail server, present them in a list and let you pick the ones you want to receive and the ones you want to delete without receiving. The tool supports POP3 and APOP. It also lets you send out emails via your SMTP server, and even supports attachments. What's more, it lets you check multiple email accounts, display emails in threads, a dial-up tool and even an address book - and all that crammed in the tiniest email client possible.
     There are versions of this program for handheld PCs as well - check them out at the developer's website.