One disadvantage of having a website like this is that it increases the amount of spam you receive. Companies that harvest e-mail addresses and compile lists for sale find your domain. Suddenly, you're receiving hundreds of messages about enlarging your genitalia, borrowing money, browsing porn, or letting Nigerians use your bank account. You also get a mess of virus-infected messages that you might prefer not to receive.
There's no foolproof way to eliminate it all but I've been able to cut waaaay down using a nice little piece of software called Mailwasher. It acts like an e-mail program except that it goes to the server from whence you pick up your e-mail and captures all your waiting messages in text only — no attachments, no graphics, etc. The messages are copied, not downloaded. The full versions remain on the server, just as if you hadn't yet fetched them.
You can then look over the list of captured messages and mark for deletion all the ones with gibberish in the subject line or the word "penis" or whatever. A filter can be set up to do this automatically, based on whatever key words you denote. You can also create what they call a "blacklist," which is a database of automatic deletions of all messages from a certain address, and a "friends" list, which will automatically mark certain folks' messages as desired. If you're on a mailing list for Cheese Eaters, and all the messages come with "[CHEESE EATERS]" in the subject line, you can put that in the filter and those will automatically be marked for your "friends" list.
Once you mark all your currently-waiting messages (or let the filters do it), you hit a button that says "Process mail" and Mailwasher goes back to your server and deletes all the ones marked for deletion. You then immediately launch your regular e-mail program and it downloads all the messages you wanted, and you proceed the way you always do. What's different is that all those virus-laden messages and ads are deleted while they're still on the server. (This is not a substitute for a virus checker like Norton or McAfee. You need one of them functioning, as well. But it's obviously better not to download those messages in the first place.)
You can also set Mailwasher to "bounce" the messages you're deleting, which means they're returned to the sender as if your e-mail address is invalid. The premise here is that it will cause some of them to take you off their lists…but experts suggest it accomplishes the opposite. And if, as occasionally happens, the spammer has sent the mail with the forged address of an innocent bystander, then you'll be spamming that bystander.
In any case, even with the "bounce" feature turned off, Mailwasher is a very handy thing. The first few times you use it, it takes no more time than it would take to download all your mail and manually delete every piece of spam. As you use it, it goes faster and faster…and it also gives you the chance to peek inside a questionable e-mail without opening it.
So how much is this wonderful piece of software? Amazingly, you can download it for free at www.mailwasher.net, and it will run fine, except that a little banner will ask you to register and donate. If you like the program but don't like that banner nagging you, you can get rid of it by sending the Mailwasher people anything more than three bucks. (The suggested donation is $20. I experimented with the program for all of five minutes before sending in my twenty.)
There are, of course, many other ways of dealing with unwanted e-mail, but this one is working well for me. It might work for you.