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I have one company that cannot send email to recicients in our SBS Exchange 2007 environment. I have checked cache DNS and MX lookups for our domain and everything seems to come out ok. We are hosted by godaddy and they are as well. <br />
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We have no issues getting email from others and have not recieved complaints from anyone else. We even have new clients send us email without issue. The other party can reply to an email we send them but they cannot create a new message and send it to us.<br />
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One problem I did notice is that I created a pop3 account from one of our other domains and and sent email from it to us via godaddy's webmail client and it came through without issue however I cannot send email to it or reply without recieveing the above email alert.<br />
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My bosses are driving me to drink..so if anyone could check somethings for me on the outside or send me a case of jack please let me know
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I have one company that cannot send email to recicients in our SBS Exchange 2007 environment. I have checked cache DNS and MX lookups for our domain and everything seems to come out ok. We are hosted by godaddy and they are as well. 

We have no issues getting email from others and have not recieved complaints from anyone else. We even have new clients send us email without issue. The other party can reply to an email we send them but they cannot create a new message and send it to us.

One problem I did notice is that I created a pop3 account from one of our other domains and and sent email from it to us via godaddy's webmail client and it came through without issue however I cannot send email to it or reply without recieveing the above email alert.

My bosses are driving me to drink..so if anyone could check somethings for me on the outside or send me a case of jack please let me know

#550 5.1.1 RESOLVER.ADR.RecipNotFound; not found ##

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

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).

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.