User account auto creation

Hello Everyone,

It's me again 

I wish to enable account auto creation. I believe my server
is protected
against dictionary attacks. I use the following Postfix
restrictions:

smtpd_recipient_restrictions = permit_mynetworks,
permit_sasl_authenticated, reject_non_fqdn_hostname,
reject_non_fqdn_sender, reject_non_fqdn_recipient,
reject_unauth_destination, reject_unauth_pipelining,
reject_invalid_hostname


I see lots of the following in my mail log:

NOQUEUE: reject: RCPT from unknown[201.240.27.159]: 550
5.1.1
<admjosephite.com>:
Recipient address rejected: User unknown in virtual mailbox
table;
from=<tomoawutnext-co.co.jp> to=<admjosephite.com> proto=SMTP
helo=<next-co.co.jp>


So I am thinking I have this correct: Postfix is looking up
the user in
the Postfixadmin database before accepting the mail and
rejecting it if
it doesn't exist.

I have seen something in the past about the order of the
statements in
the 'smtpd_recipient_restrictions' directive but I cannot
seem to find
it now. So I would also ask if anyone knows where that is or
if I have
my statements in the correct order to keep me protected if I
enable user
account autocreation.

As always, Thanks in Advance!

Regards,

Brian Carroll
Member; Managing Consultant
Secure Network Designs, LLC.
www.securenetdesigns.com
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