exchange domain configuraiton

Hi , from last 3 years our exchange is configure like this : sbs.mydomain.local

I know its not good to broadcast mailserver as local. and it can put our domain as black list. but it was fine from last 3 years. but recently , may be its giving trouble,

now if configure my exchange server as sbs.mydomain.com , but it will be too much problem as other pc and other server

now my question is , if I use smart host and try to send email vis isp mail server  to send email out side, will i be able to overcome this problem ??
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fosiul01Asked:
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Michael WorshamStaff Infrastructure ArchitectCommented:
For one, the .local is for internal use only. This is what your Active Directory (AD) domain is based upon. You cannot 'register' .local as an external domain address. It's just not possible.

When it comes to 'smart hosts', I really recommend you read over this site's service called 'Mail Relay':

Mail Relay Outbound Service Details:
http://www.dnsexit.com/Direct.sv?cmd=mailRelay

MS Exchange - Smart Host - SMTP Authentication Configuration for Mail Relay Outbound Service
http://www.dnsexit.com/support/mailrelay/exchange/setup.htm

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Point-In-CyberspaceCommented:
One word: Yes
fosiul01Author Commented:
that good, i will have to do that then

like when i sent email from our organization to outside, if i check the header it will say,
email is comming from sbs.mydomain.local

if i check our dns report via dnsstuff , it will say, Greeting problem......

so , I will have to speak with ISP for permission of smart host.

one question, to use smart host, i just need to add smart host address under smart host box , is not it ??

other then that , do i need to change any setting of excchage server ??
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fosiul01Author Commented:
i was reading this link as you guys advised
http://www.dnsexit.com/support/mailrelay/exchange/setup.htm

its saying to use username and password, why i need to put username and password ??
fosiul01Author Commented:
i follwed this link before :
http://support.microsoft.com/kb/909005/en-us

and i did everthing what saying in under this :Recipient filtering is only available in Exchange Server 2003.

so that mean, if my server received any ndr, it will not reply to those , is that right ??
Michael WorshamStaff Infrastructure ArchitectCommented:
The username/password is for allowing your Exchange server to authenticate with the DNS Exit server site. If you are using their instructions for another smart host, you will most likely need to check with them to see what steps you need to take to allow your Exchange server to talk to the 3rd party mail server so it will allow for outbound e-mail data transfer.
Michael WorshamStaff Infrastructure ArchitectCommented:
I recommend reading this article when it comes to Recipient Filtering as it is a bit better worded...

http://www.msexchange.org/tutorials/Sender-Recipient-Filtering.html
fosiul01Author Commented:
please ignore my previous comments , its suppose to be for another question.
Point-In-CyberspaceCommented:
By default smtp servers of providers give automatically permissions to use for provider's ip addresses.
Try to simply add to the smarthost the name of the provider smtp server and send an email to test.
fosiul01Author Commented:
Hi guys, i will close this question soon
but can any one please check this question
http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/SBS_Small_Business_Server/Q_23803397.html
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