automatic email address generator to avoid spam

email,spam,bot

[NeilsPHP]

hi,
i am trying to create forum with members name and email address displayed,but don't want to use the real email address for spamming reasons.Instead,I want to write a script that will create another email address ([e-mail]) from ([e-mail])
I also want to be able to
1.keep track of real and fake email,using probably mysql
2.have a time limit on fake email so it will expire on its own
3.any email sent from some other email to fake email will get routed to good email on other end,without disclosing good email.
4.stop receiving any email to good email from fake email(assuming it will get deleted automatically and sender will receive not deliverd message)

I can create 100's of emails from my webhost account,store in db and write script to 'assign' and 'route' manually ..but thought if there is a way to do it automatically,will be greatly appreciated
thanks

[eelixduppy]

I don't understand the purpose of doing anything like this. There doesn't seem to be any value at all. Allow the members of your forum the option to display their email address to the public or not, and if they chose to show it to the public, then they should have to deal with the consequences of spam.

[NeilsPHP]

but how will other members get hold of them if need to contact ?
example..on a dating site,how can one member contact another one ? (i know its different mailing system than what I intend to do)..
Also..on some websites like craigslist,the real email addr won't show but somebody can still contact you..