Exchange Server 2013 Incoming Mail (receive connector)

Hi
I am installing an Exchange Server 2013 for the first time.

It is sitting on a single server (Server 2012 R2 Domain Controller). This is the main server in the organisation and has Exchange installed on it.

Everything apart from the receiving emails is working.

I have pointed port 25 from the firewall to the internal IP of the server.

When I look at the "receive connector" in the Exchange Admin Centre I have 5 connectors. Client Frontend, Client Proxy, Default Frontend, Default and outbound proxy.

None use port 25. Also if I look at the scoping the remote network settings are ffff.ffff.ffff.ffff.ffff.ffff.ffff.ffff. (is this right.

Am I missing something. I dont receive and bounce backs to email acccunt I am sending from.

Thanks

Jay
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Optima SystemsNetwork EngineerAsked:
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Marwan OsmanCommented:
////one use port 25. Also if I look at the scoping the remote network settings are ffff.ffff.ffff.ffff.ffff.ffff.ffff.ffff. (is this right.

//// yes that is right, it means that the exchange server is able to receive message from anywhere.
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Marwan OsmanCommented:
you must see the port 25 configured in the send connectors, to view the send connectors configuration, open exchange management shell and run it as administrator, run the cmdlet  Get-SendConnector |fl

you will see the send connector setting including the port 25
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Marwan OsmanCommented:
are you able to send internally?
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Optima SystemsNetwork EngineerAuthor Commented:
Send an receive internally is fine. I found that the hosting co of the domain have not entered the new external IP correctly so until that refreshes I don't know if that's the problem  
If they change it and it still doesn't work I will come back to you. Sending externally works perfectly.
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Will SzymkowskiSenior Solution ArchitectCommented:
It is sitting on a single server (Server 2012 R2 Domain Controller).
Exchange 2013 is not recommended to be installed on a Domain Controller. Will it install? Yes, will you run into issues? More than likely. See the link below. I would not recommend this setup either does Microsoft.

https://technet.microsoft.com/en-us/library/ms.exch.setupreadiness.warninginstallexchangerolesondomaincontroller(v=exchg.150).aspx

Will.
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Nathan HawkinsTechnical Lead - Network SecurityCommented:
Tho not supported dont let that stop you. Personally I dont think thats a good design... Too many eggs in one basket - one blown CPU or even motherboard and there goes your domain everything AND email and probably a few other things...

Anyway, your default receive connector MUST be port 25...

For IP Address: set it to 0.0.0.0-255.255.255.255

 and Network adapter bindings: set to (All available IPv4), port 25

Restart your Exchange transport and Exchange information store services and you should be receiving email.
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R--RCommented:
On default frontend Servername connector port 25 should be configured and Anonymous users should be selected.

Default FrontEnd <server name>   Accepts connections from SMTP senders over port 25. This is the common messaging entry point into your organization.

you can refer the ling https://moonstarit.wordpress.com/2013/05/14/receive-connector-on-exchange-2013/ written by sonat yaylali
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Optima SystemsNetwork EngineerAuthor Commented:
Dear All
Many thanks for the comments. However is was the DNS entry on the hosting site that was the proble.

Now that's sorted mail is flowing fine.
Thanks
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