Recs.
Updated
A free service that allows a variable number of spam email addresses that can be created on-the-fly to be funnelled to a protected email address.
Specs
Pros
Pro Mail address expires by the count, not by time
SpamGourmet works by having a protected account and spam accounts that can be created on the fly just by adding something in front of the protected account's address. From here it's possible to choose which spam accounts get funnelled into the protected account.
You can set an account-default number of emails to get through, or you can set a number as part of the address creation. You can use the web admin to manage refreshing the count or granting permanent exemption or termination.
Cons
Con Attachment size limit
Modern email services can often handle bigger than standard attachments. The SpamGourmet server limits attachment sizes more strictly to conserve resources, so you can't get them.
Con Reply addresses can leak
The reply feature is convenient, but if you're not careful, your email client might automatically include the special reply address in the threading quotation. This means anyone who gets it can reply in your name to that address.