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Thanks for that info, but using these tools just proves that the emails are in fact being sent (I see DELIVER as the event code) but only emails to my GMail account are coming through. Others are simply going away, not showing up at the destination server. This is very strange to me.
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Thanks for that info, but using these tools just proves that the emails are in fact being sent (I see DELIVER as the event code) but only emails to my GMail account are coming through. Others are simply going away, not showing up at the destination server. This is very strange to me.

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I have Windows SBS with the Exchange 2010 set up to send emails, but for some reason, none are being delivered and I am not sure how to debug this problem. I have Exchange 2010 set up with an outgoing SMTP transport that I have tried both Smart Host and DNS mechanisms. My ISP is Comcast and I have set up a Business Class account with username and password there, and this information is set up in the Smart Host, but there is no place to put it in the DNS transport. I have checked the mail queues and they are empty, and I do not get bounce back messages. The sent emails simply disappear. Before setting up the Comcast username and password, I was getting connection errors, so I believe that the emails are now at least passing on from my server. I am stuck!
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I have Windows SBS with the Exchange 2010 set up to send emails, but for some reason, none are being delivered and I am not sure how to debug this problem. I have Exchange 2010 set up with an outgoing SMTP transport that I have tried both Smart Host and DNS mechanisms. My ISP is Comcast and I have set up a Business Class account with username and password there, and this information is set up in the Smart Host, but there is no place to put it in the DNS transport. I have checked the mail queues and they are empty, and I do not get bounce back messages. The sent emails simply disappear. Before setting up the Comcast username and password, I was getting connection errors, so I believe that the emails are now at least passing on from my server. I am stuck!

Exchange Server outgoing email disappearing

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

Email Servers

Small Business Server (SBS) is a line of server operating systems targeted at small businesses by bundling the operating system with a number of other Microsoft products that would normally need to be purchased or licensed separately. The most notable inclusions are Exchange, SQL Server, SharePoint and ISA/TMG (Microsoft's firewall and proxy server).