I do the unique address thing, but I also have another system for giving out temporary email addresses. If I want to hand an email address which I know should n

I do the unique address thing, but I also have another system for giving out temporary email addresses. If I want to hand an email address which I know should not receive email after say, this Saturday, I'll just give them "2016-09-03@tmp.grepular.com" - I don't have to do anything to set that up, it will accept mail as long as the date isn't after 3rd September 2016. I blogged it up a while ago here: https://grepular.com/Automatically_Expiring_Email_Addresses https://grepular.com/Automatically_Expiring_Email_Addresses