We have a scenerio of network in which our front-end exch server is connected with our ISA firewall for e-mail forwarding.
but since yesterday we are getting an issue in sending mails to external domains. the problem is that while sending the user gets different undelivery message eg. " There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
Please provide your kind support on this ASAP.
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When you use Microsoft Outlook Express to send and receive mail to a Post Office Protocol 3 (POP3) or Internet Message Access Protocol (IMAP) server running Exchange 2000 Server or Exchange Server 2003, you may receive the following error message. Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity.
<p>Microsoft Exchange Server 2003 released on September 28, 2003. One of the new features in Exchange Server 2003 is enhanced disaster recovery which allows administrators to bring the server online more quickly. This is done by allowing the server to send and receive mail while the message stores are being recovered from backup. Now newly released version of Exchange server is Exchange 2010 after 2007 version. Exchange server 2010 officially released on 9th November 2009. But here I will discuss about Microsoft Exchange server 2003. In a workstation most of users are use Microsoft Exchange server as mail server.<br />
<p><span><span><b>Requirement of Exchange Server 2003:</b></span></span> <span> </span>Required OS for Exchange Server2003 is Microsoft Server 2oo3. There this Server should be a domain controller. For Exchange 2003 need some protocol like <br />
<p> <br />
<p><span><span><b><span> </span><span> </span></b></span></span>1> asp.net<br />
<p><span> </span><span> </span>2> SMTP<br />
<p><span> </span>3>NMTP<br />
<p><span> </span><span> </span>4>W.W.W<br />
<p>IIS should be install in server . In hardware system should have minimum 256MB of memory<br>
<p><span><span><b>Installation of Exchange Server 2003: </b></SPAN></SPAN>There have three steps to install Microsoft Exchange Server 2003.<br>
<p><span><span>1><span> </SPAN></SPAN></SPAN>Preparation of forest<br>
<p><span><span>2><span> </SPAN></SPAN></SPAN>Preparation<span> </SPAN>of domain<br>
<p><span><span>3><span> </SPAN></SPAN></SPAN>Installation<span> </SPAN>of Exchange Server<br>
<p>To install Exchange Server you have to install the required protocol first. I have install the windows component such as IIS, ASP.NET, NNTP, W.W.W. from control panel with OS CD. Then I insert the Exchange Server Disk in CD rom drive and start the preparation of forest. I open the disk and run the forest prep from Exchange 2003 deployment tools. It will take several times to complete. After completing the forest prep I have run the Domain prep with the same procedure. The Domain prep will take also lots of time to complete. Then I have installed the exchange server by creating a new exchange organization. The total process also possible to complete from Run with command. The total job takes a huge time almost one hour or more. After installing Exchange Server I have configured it as per direction of the company. I have add users, groups, I create new administrative group. Following this process there I have done the whole job successfully. <br>
first turn off sync Mail accounts in iTunes and remove the mail
accounts in the iphone, then with openss from my windows WinSCP set
permissions /var/mobile/Library in the folder "Mail" to 777, now itunes
can sync yours mail accounts, then go to iPhone open icon Settings into
then go to "Mail, Contacts, Calandars" option and go Accounts "xxxx"
-> SMTP here set the username and password for ur account and delete
other SMTP Servers and if you have another account with other server
you just add. and add /exchange to the end of my server name (mail.server.com/exchange)
then it worked perfectly. You also need to make sure that your smtp port on the exchange server matches the iphone's smtp port and that your firewall won't block it.
Now when somebody reports that he or she is not getting any "outside" emails, I go to Exchange System Manager -> Servers -> <server> ->Protocols -> SMTP -> Default SMTP Virtual Server - > Current Sessions and I see a bunch of .br, .it, .ar, OHIOIJHOJOJI, etc, user names with connected times 98353566, 43543543, 3453453 seconds, or in another words with endless connection times.
I understand, that once the exchange reaches the number of connections of 50, it stops accepting new connections, stops receiving emails and here is my qustions: 1. Why the "Terminate All" command doesn't remedy the problem with email flow? As the second option, I try to restart SMTP service, but it freezes in a stopping mode leaving me with only one option to restart entire server. (BTW, I've also noticed that it feezes after I update IMF filter and I need to restart the server) 2. what are those connections and how to protect Exchange from them?
Click on tools --> accounts --> highlight your mail account and click change. In the box where it says Microsoft Exchange Server, enter the server name or IP address. Hit next / finish and you should be fine. Make sure your credentials are OK