Steve Heaven wrote: > On Mon, 2009-09-07 at 11:50 -0400, Sahil Tandon wrote: > >> >> You should not accept mail for invalid recipients. Use existing >> functionality to build a cache/database of valid recipients "on the fly". >> See: http://www.postfix.org/ADDRESS_VERIFICATION_README.html#recipient > > We have no way of knowing if the recipient address is valid or not as we > are only acting as a relay for the final destination. > We cannot build a database of recipients on the fly as that information > is held on the various servers of our clients, to which we do not have > access. >
Sahil Tandon gave you a link containing the solution to you problem. I suggest you read it before you say it can't be done. Tip: scoll up to "How address verification works". Mikael
