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Three SMTP Receive Connectors

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Three SMTP Receive Connectors - 20.Sep.2010 7:10:10 PM   
AndrewKeil

 

Posts: 3
Joined: 20.Sep.2010
Status: offline
System Details:
- Windows SBS 2008 - with all the latest updates (and optional updates applied)
- Exchange 2007 (Version: 08.01.0340.000)
- OWA working correctly with no prompting for extra security credentials
- 3rd Party Certificate setup for only "remote.askinteractive.net"

Since I have a fresh setup of SBS 2008 (running Exchange 2007) I have the following three SMTP receive connectors:

(1) Default ASKSERVER
- FQDN: ASKSERVER.asksbs.local
- Network:
- Listens on 10.5.71.1 Port: 25
- Receives mail on all the local internal IP addresses 10.5.71.0-10.5.71.253 (& 10.5.71.255-10.5.71.255)
- Authentication:
- TICKED Transport Layer Security
- NOT TICKED Enable Domain Security
- TICKED Basic Authentication
- TICKED Offer Basic Authentication only after starting TLS
- TICKED Exchange Server Authentication
- TICKED Integrated Windows Authentication
- NOT TICKED Externally Sourced
- Permissions:
- NOT TICKED Anonymous Users
- TICKED Exchange Users
- TICKED Exchange Servers
- TICKED Legacy Exchange Servers
- NOT TICKED Partners

(2) Windows SBS Fax Sharepoint Receive ASKSERVER
- FQDN: ASKSERVER.asksbs.local
- Network:
- Listens on 127.0.0.1 Port: 25
- Receives mail on all the local IP address 127.0.0.1-127.0.0.1
- Authentication:
- NOT TICKED Transport Layer Security
- NOT TICKED Enable Domain Security
- TICKED Basic Authentication
- NOT TICKED Offer Basic Authentication only after starting TLS
- NOT TICKED Exchange Server Authentication
- NOT TICKED Integrated Windows Authentication
- NOT TICKED Externally Sourced
- Permissions:
- TICKED Anonymous Users
- TICKED Exchange Users
- NOT TICKED Exchange Servers
- NOT TICKED Legacy Exchange Servers
- NOT TICKED Partners

(3) Windows SBS Internet Receive ASKSERVER
- FQDN: remote.askinteractive.net
- Network:
- Listens on 10.5.71.1 Port: 25
- Receives mail on all the local IP addresses
- 0.0.0.0-10.5.70.255
- 10.5.71.254-10.5.71.254
- 10.5.72.0-255.255.255.255
- 10.5.71.1 {***this I added myself***}
- Authentication:
- TICKED Transport Layer Security
- NOT TICKED Enable Domain Security
- NOT TICKED Basic Authentication
- NOT TICKED Offer Basic Authentication only after starting TLS
- NOT TICKED Exchange Server Authentication
- NOT TICKED Integrated Windows Authentication
- NOT TICKED Externally Sourced
- Permissions:
- TICKED Anonymous Users
- NOT TICKED Exchange Users
- NOT TICKED Exchange Servers
- NOT TICKED Legacy Exchange Servers
- NOT TICKED Partners

Questions (Note: My SBS Server (with Exchange 2007) itself is on IP 10.5.71.1) :

Q1) Currently the SBS Summary Network Reports fail to be e-mailed based on the above setup.
However when I remove the 10.5.71.1 from the Windows SBS Internet Recevie ASKSERVER Receive Connector
(under Receives mail on) it does work. The problem I have is I have other software on the same server
that requires simply SMTP e-mails to be sent with no authentication (eg. APC UPS alerts etc...) and that
is why I added 10.5.71.1 to the Windows SBS Internet Recevie ASKSERVER Receive Connector. What should I
do to make both simply non-authenticated e-mail to work and also the SBS Summary Network Reports to also work
from the same server (ie. 10.5.71.1)?

Q2) Since more than one receive connector in the above example listens on IP: 10.5.71.1 (Port 25) and due
to my addition of adding 10.5.71.1 to the Windows SBS Internet Recevie ASKSERVER Receive Connector
(under Receives mail on) and the Default ASKSERVER Receive Connector allows e-mails from 10.5.71.0-10.5.71.253,
which receive connector takes precedence for e-mails sent from 10.5.71.1? Can this be ordered in some way?

Q3) Can the above be simplified into only one receive connector? Or would this cause other problems?
Post #: 1
RE: Three SMTP Receive Connectors - 22.Sep.2010 11:44:49 AM   
travis.sheldon

 

Posts: 359
Joined: 16.Sep.2010
Status: offline
I'm not an SBS expert by any means, but I do a lot of Exchange 2007 and 2010 work..so hopefully we can figure it out :)

Just tread lightly with SBS..we all know how sensitive it is :)

The problem I have is I have other software on the same server
that requires simply SMTP e-mails to be sent with no authentication (eg. APC UPS alerts etc...)


In the other programs, do you have the ability of specifying the SMTP port used? If so, I would create a new receive connector on a different port and enable the messages to be sent without authentication (Make sure to only allow communication from the same subnet)

However when I remove the 10.5.71.1 from the Windows SBS Internet Recevie ASKSERVER Receive Connector (under Receives mail on) it does work.

Try adding 127.0.0.1 port 25 on that connector if you want to keep the IP address specified..the windows report may be submitting the messages to "localhost" and not to the actual "IP" of the server.

I dont believe you can change the order of the receive connectors as I do not believe there is an order..they're services binding to a port an IP, which as you see, you cannot have more than one listening on the same IP/port.

If you're not doing a 1 to 1 static NAT, then you should be able to change the SBS Internet Receive to accept mail from the firewall/router, and then use the other connector for your local users who need SMTP with authentication.

Since you have different authentication methods being used, I do not believe you can simplify to one connector.

(in reply to AndrewKeil)
Post #: 2

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