Customize a mail forwarder

You can use any existing mail forwarding solution. I need it customized to do the following: Features: 1) Forward mail addressed to foo at my domain where foo is on a pre-defined list of addresses (Valid List) 2) Bounce any mail where foo is not on Valid List 3) All accepted mail is forwarded to one address which is easy to change 4) Add an address to Valid List if it is composed in a valid way (e.g., number at end is the number of letters preceding it) and is not on a Blocked List 5) Allow admin to change this rule 6) Allow admin to easily edit Blocked List Address Generation Option: As an alternative to features 4-6, implement a "give me an address" service that returns a unique email address when called from a JavaScript browser bookmarklet. Add unique email address to Valid List. If a source URL was already used to generate an address previously, return the existing address. Allow admin to search Valid List by i) address or ii) source URL. Allow admin to edit and delete entries. Mail Server Option: If it is easier for you to implement this on a mail server, I am happy to downloaded all accepted mail with a POP client Background: For some time, I’ve been using unique email addresses when signing up on websites. Some of those have been sold to spammers. Currently all mail to the domain I’m using goes to a Google Apps account. However, Google spam filtering increasingly has too many false positives and false negatives. Scope: Develop and test. Install on a virtual server (you can recommend) and test.