If you give web sites and new contacts a disposable email address instead of your real one, you can selectively disable a disposable address as soon as you get spam through it, but continue using all other aliases.

Mailinator has been around for a long time, and is easily the most recognizable name in spam-free registration. Here’s how it works: Mailinator creates a temporary email address which lasts for 48 hours, during which you can send any number of registration verification links (or any other type of email) to that address. This is especially useful for signing up to sites which require you to verify that you are indeed a real person, as it circumvents the problem of receiving spam or advertisements in your personal inbox when all you want to do is access the features of the site once.

Guerilla Mail has one unique feature that makes it stand out from the rest: it’s the only temporary email provider which allows you to reply to emails you receive, just like a regular email address. While this may not seem very practical for verification notices, some websites do require a written reply to verify your existence; so in such cases, Guerilla Mail will be your only alternative. In addition, Guerilla Mail can also act as a proxy email address for contacting people during those one-time reply situations, so you don’t have to go to the trouble of creating a separate account in Gmail or Hotmail just to accommodate these instances.
If you’re thinking of upgrading, Guerilla Mail does offer additional benefits such as an account without an expiration date, email forwarding capabilities and no advertisements. The interesting take on this is that you get to decide on how much you want to pay for these bonuses, so it’s really an example of how far Internet service providers have come until now.

myTrashMail is a offers a temporary email forwarding service. Just set up an account to get a temporary address that you can use to register for sites. Any email sent to that address is automatically forwarded to your real email address.

Don’t need an email inbox with longevity? Try 10 Minute Mail, which offers accounts that expire after 10 minutes (with optional renewal).

After registering for an account on KasMail, you’ll get a temporary inbox to receive and store all those messages that you prefer to keep separate from your private email account. You can decide when the disposable mailbox will expire, or even choose to keep it forever. Free to use.