I run my own mail server so I was able to come up with my own way of handling temporary email addresses. My server will accept email matching the following form

I run my own mail server so I was able to come up with my own way of handling temporary email addresses. My server will accept email matching the following format: yyyy-mm-dd@tmp.example.com But it will only accept that mail if yyyy-mm-dd is either today, or some point in the future. So for example, if I enter a competition which finishes in three weeks, I might use an email address to sign up which expires in a month: 2012-06-20@tmp.example.com Or if I'm just checking out a service that looks interesting, I might use an address which expires today. Eg: 2012-05-20@tmp.example.com I don't have to set these up each time. I just use them knowing that they will work until a certain date. Obviously, this would stop working if the method became popular. And if somebody signed me up for something using an email far in the future. I can always change the subdomain that I use though, or modify the format slightly at any point. EDIT: I wrote up how I did this using Exim here: https://grepular.com/Automatically_Expiring_Email_Addresses https://grepular.com/Automatically_Expiring_Email_Addresses