Sorry for my english.
Here is a big problem. I read a lot of articles in forums but I never found solution.
I have SBS2003 and I am using Exchange 2003 SP2 on It.
I would like exclusively sending mails with DNS option selected not relaying with smart host.
I have a MX record in my DNS who is pointing to exchange server (WAN address).
NIC's DNS is pointing to Itself.
The smtp connector is configured with DNS option.
SMTP protocol : incoming mail is TCP 52525 and 25 for outgoing.
I receive mails from my customers.
I use authentication with mail client (mail (MAC OS X) and Outlook) Plain Text.
So, I can send any mails to any destinations if relay is open but when I am trying to prevent spamming (picture 1), mails stay in queue !
The only way to release the queue is to configure sending connector with smart host instead of DNS.
When the queue is cleared, I can configure with DNS option and send again (if the relay is open)
I tried Best practice tools, updates, kb, etc...
Lan, range IP:192.168.255.0/24
What's happening ? What are misconfigured
Thx in advance for suggestions