Hi,
I'm a relay for a lot of domains and currently I think my server
processes every email that it gets, check if its spam or not, and then
try to relay it to the destination server and if the user doesn't exist,
the destination SMTP-servers says something like: User Unknown. But is
it possible to check if the user exists before it process the mail? The
destination servers is all different, Exchange, Linux with Sendmail etc
etc so I don't have a database of all the existing destination-users on
my server.
Is there any solution to this? Or is it something I have to setup on my
spamfilter?
I use Postfix 2.5.5 with MaiaMailguard 1.0.2
Thanks,
Patric
