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Hi...We have three exchange servers 2010 SP3. CAS/HT/MBX role installed on these three servers. No Edge Transport server. Mails are directly going outside from HT servers.<br />
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But we have observed that two servers are participating to send mail outside (internet) but third server is not. All three servers are added as 'Source server&quot;<br />
<br />
How we can rectify this issue on 3rd server, how we can telnet internet domains, is this is natting issue with public IP.
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Hi...We have three exchange servers 2010 SP3. CAS/HT/MBX role installed on these three servers. No Edge Transport server. Mails are directly going outside from HT servers.

But we have observed that two servers are participating to send mail outside (internet) but third server is not. All three servers are added as 'Source server"

How we can rectify this issue on 3rd server, how we can telnet internet domains, is this is natting issue with public IP.

Internet Send Connector

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

An email client, email reader or more formally mail user agent (MUA) is a computer program used to access and manage a user's email. A web application that provides message management, composition, and reception functions is sometimes also considered an email client, but more commonly referred to as webmail.