> -----Original Message-----
> From: Gururajan Ramachandran [mailto:gururajan20815@yahoo.com]
> Thanks for replying. Do you know if this would work in
> an intermediary system? One that forwards email to
> another system and does not have the actual users'
> home directories?
It can. It all depends on the router. If the router that sends mail to the
other system is set up to verify recipients, it will work. You also need to
use "verify = recipient" in the RCPT ACL, of course. For example:
accept domains = +relay_to_domains
endpass
message = unrouteable address
verify = recipient/defer_ok
Most of the time, a callout is the easiest way to accomplish actually
checking to see if the user is valid.
> If not, is it possible to do it via searching a
> database of valid users or some other method?
Yes, the router can do this. For example, my Exim system forwards mail to a
Microsoft Exchange 5.5 system. The router uses the LDAP database on the
Exchange system to check if recipients are valid. There's a good example of
this in the sample configuration files -- see C043.txt, if this is what
you're looking to do.
