On 5/19/2010 3:44 PM, Phil Howard wrote: > On Wed, May 19, 2010 at 15:13, Wietse Venema <wie...@porcupine.org > <mailto:wie...@porcupine.org>> wrote: > > Don't do that. > > Postfix will accept mail for addresses that don't exist and later > bounce that mail to innocent people. > > > Of course I don't want to do that. Sounds like what I need is > something that will map the address at RCPT TO time, so it can use the > mapped result to do further checks to see if the user exists (e.g. > under the mapped-to domain). > In addition, in the configuration posted previously, you are not using virtual_mailbox_maps for validation anyway so Postfix will allow any user listed at the domains in virtual_mailbox_domains. The dovecot transport then accepts or bounces it.
There should be a list of users that dovecot can deliver to, can't Postfix access this too?
