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Need help setting up SMTP on IIS6 to send out email to a smarthost

Posted on 2011-09-29
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Last Modified: 2012-05-12
I have a situation where I need to configure the SMTP protocol on our webserver (server 2003) to send out mail from another internal server that runs an application requiring outgoing SMTP via a smarthost (dyndns).

I have the dyndns account, and have used it successfully in many instances of exchange to forward out mail. I know it works, and I know what its capable of.

However, I am a bit lost on the SMTP side of the server 2003.  I have installed the protocol, but I am a bit unclear how I should set up the local and remote domains.  The actual email domain resides on a mailserver outside of the organization.  Lets call its xyz.com.  Users from the organization use pop3 to get xyz.com mailboxes from this mailserver which is on the ISP. (I know its a tradgedy to operate this way, but it will hopeully change soon).

Anyways, the software on the internal network authenticates with the webserver (using SMTP) to send notification messages out to clients on their email domains, and then a notification that a order was placed to webmaster@xyz.com.  I cant quite figure out why its not working, but I have a sneaky suspicion that its got some kind of relay problem.  Can anyone tell me exactly what to set up for the local and remote side to enable the SMTP to communicate and send messages from it internally (webmaster@xyz.com or whatever email address neccessary) to the actual webmaster@xyz.com on the ISP mailserver??  Hope this makes sense. Thanks.
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Question by:jhuntin
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gaurav05 earned 1500 total points
ID: 36813389
Hi,

you need to setup ip addresss in  relay restriction  for your domain.


also check this one

http://www.petri.co.il/configure_iis_to_be_a_smart_host_for_exchange.htm
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Author Closing Comment

by:jhuntin
ID: 36925629
Not for exchange, but somewhat accurate. Thanks, it did help. I learned that checking the event logs also give you quite a bit of info as to what is happening.
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