RE: Exchange SMTP relay w/ISA

Hi Paul,

Welcome to this public newsgroup.

>From your description, I understand that because of some limitation you
need to configure your Exchange 2003 to send the emails to a smarthost for
relay. If I misunderstood your concerns, please let me know.

Generally speaking, if you want to send the emails to the internet, the
recipient mail server might perform a reverse DNS look up for the remote
mail server, if the domain name of your SBS server is not matched the PTR
records in the recipient DNS server or if there are no PTR records for your
domain in the remote DNS server, the email will be denied by the remote
mail server. Since we can not create one PTR record for two mail servers on
the SBS 2003 domain with only one internet public IP address, we suggest
using the smarthost to send the internet email. You can ask your ISP to
create a smarhost for you to relay internet emails. You need also add the
smarthost to your Small business SMTP connectors.(Such as SMTP credential)

Please follow the steps below to configure the SMTP connectors: (You need
to configure the other SMTP setting according to your ISP's requirement.)

1. In Exchange System Manager
2. Choose the Small Business SMTP Connectors
3. Click Forward all mail through this connector to the
following smart hosts, and then type the fully qualified domain name (FQDN)
or the IP address of the ISP mail server for relay.
4. Leave the other setting as the default one.

Hope the above information helpful. If you have any other concerns, please
let me know. I am here waiting for your updates.


Best regards,

Charles Yang (MSFT)

Microsoft CSS Online Newsgroup Support

Get Secure! - www.microsoft.com/security

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