Guerrillamail is a service that allows for creation of disposable accounts of mail which we can make use for a period of fifteen minutes and can be renewed by another additional fifteen minutes. In any case you can follow the time that is left - thanks to the accountant which is built-in in your own page of the temporary mailbox.
This way we can avoid to provide our personal e-mail ID to anyone. The good feature is that we can also respond to the mails received, everything during fifteen minutes that we can extend successively by other fifteen.
A useful tool mainly for those services that demand confirmation to us by means of e-mail - Services which we may not be sure of to SPAM our inboxes.
To summarize, Guerrilla Mail provides you with disposable e-mail addresses which expire after 15 minutes. You can read and reply to e-mails that are sent to the temporary e-mail address within the given time frame.