Thanks, but this is not helpful to me
I have a multi-layered e-mail filtering path, and I need, I suppose, LDAP integration or a valid receivers list inside your software.
I use Lotus Domino, and it is configured to reject (550) invalid recipients, but we also have a GFI MailEssentials server sitting in between, so this won't help me unless I completely reconfigure my mail path.
Thanks.