Just allow anybody who has a domain to configure the tempalias MX as their MX (or an MX for a subdomain of theirs) and everyone (with a domain) can have their very own tempalias. Good luck blacklisting that.
Note:
this is not public yet - it's on a branch. I will implement domain name checking and maybe some kind of registration before putting something like this live - but you get the idea
http://github.com/pilif/tempalias/commit/6762d1bfcbc64d67f4e...
Just allow anybody who has a domain to configure the tempalias MX as their MX (or an MX for a subdomain of theirs) and everyone (with a domain) can have their very own tempalias. Good luck blacklisting that.
Note:
this is not public yet - it's on a branch. I will implement domain name checking and maybe some kind of registration before putting something like this live - but you get the idea