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Can I install a single Exchange 2010 server for a small company with all roles on the same server?

Posted on 2011-02-18
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Last Modified: 2012-06-27
I need to install Exchange 2010 for a client and want to install it on a single server. I've previously done two migration upgrades from Exchange 2003 but this install has no prior Exchange servers. I tried installing 2010 and peformed the basic configuration steps, setup send and receive connectors and tested. I can send email to outside email accounts and between Exchange accounts internally but I cannot receive test emails from outside. I've got anonymous users checked in my receive connector configuration. I've tested using telnet from another system internally and successfully sent an email from an outside email account. I cannot telnet in to port 25 from outside my network. My firewall is configured to accept port 25 traffic inbound and I have a DNAT from the WAN IP address to the Exchange server's inside LAN IP for all port 25 traffic. This server has the CA,HT,MB roles installed. Do I require the Edge Transport role added and can I have this one server host all the roles?
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Question by:jtforde518
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zippybungle2003 earned 1000 total points
ID: 34926626
You do not need that role. Can you telnet from a local machine to the server, does the server have any AV software on blocking port 25.
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Author Comment

by:jtforde518
ID: 34926810
yes, I can telnet from another server and send mail from an outside email address to an exchange account and the mail is received. I do not currently have any AV software running and my server firewall is turned off.
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by:zippybungle2003
ID: 34926832
are the antispam agents installed in exchange on the server particualry content filtering, can you disable that and test again. You will find that on the hub  role
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Author Closing Comment

by:jtforde518
ID: 34927328
Once I had confirmation that I didn't need the Edge role installed (edgetransport.exe is running and listening anyway) I did a wireshark capture and confirmed outbound port 25 traffic but no inbound port 25 traffic was ever reaching the server. I noticed that when I did a netstat -nbt that I didn't see anything listening on port 25 listed. However I did find an issue with one of my firewall rules (Vyatta) and once I corrected that I now have email flowing bidirectional. I'm accepting your solution as it helped prod my thinking and you responded so quickly to help. Thanks!!!
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