Miles Fidelman: > Wietse Venema wrote: > > Recipient verification does not expand a local alias (imagine what > > would have to be done to verify with addresses in .forward files, > > or in a mail distribution list). > > > > > Maybe I'm dense, but what would be the problem with verifying addresses > in .forward files?
Basically, the problem is the same as with other mechanisms, namely that the expansion may produce multiple results. Address verification would be a lot more complicated if it had do deal with forks and recursion. > For list managers, it's a different story - the list manager needs NDNs > in order to identify and remove bad addresses. Not all local aliases do or must replace the envelope sender. Wietse