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Exchange Server 2013 External Mail Relay RRS feed

  • Question

  • I have a virtual server using a fixed external ip and operating as a dedicated Exchange Server 2013 with Windows Server 2012 Standard. I have migrated accounts over from another VM running Exchange 2007. All recipients, accepted domains, policies etc appear to have been imported but I am facing some challenges configuring Exchange 2013 to relay external mail. Internal mail relays just fine and mail is being received from both internal and external sources.

    I have two Send Connectors set up.

    The first was created during Exchange Setup:

    General
    Name: “To Internet”
    Connector Status: Enable
    Comment: Null
    Protocol Logging level: None
    Maximum Message Size: 50MB

    Delivery
    Send mail connector: MX record associated with recipient domain
    Smart Host: Null
    Use external DNS lookup on servers with transport roles: Unchecked

    Scoping
    Type: SMTP
    Domain:*
    Cost:10
    Scoped send connector: Unchecked
    Source server: My 2007 server & My 2013 Server
    FQDN: My 2013 servers external domain name

    The second I created to try and overcome the problem by using a Smart Host albeit my host restrict the volume of mail allowed and so this would be inadequate in the long term but in any event a test mail was rejected by their server:

    General
    Name: “Send Internet Mail”
    Connector Status: Enable
    Comment: Null
    Protocol Logging level: None
    Maximum Message Size: 10MB

    Delivery
    Send mail connector: Route mail through smart host
    Smart Host: My providers smart host
    Authentication: Basic using my account details
    Use external DNS lookup on servers with transport roles: Checked

    Scoping
    Type: SMTP
    Domain:*
    Cost:1
    Scoped send connector: Unchecked
    Source server: My 2013 Server
    FQDN:NULL

    Initially I was getting "unable to relay" messages but with the various tweaks and changes I've made I have overcome this and now I get "delivery delayed" messages so it seems the mail is queuing but not getting sent.

    Any help would be very much appreciated.


    Brian Watson

    Monday, July 1, 2013 10:51 AM

All replies

  • Update.

    I had a typing error in my hosts relay settings. Now fixed I am able to send through them but I really want to manage this locally as I did in Exchange 2007.

    So for now Send Connector "To Internet" is disabled and  “Send Internet Mail” is working using an external Smart Host.


    Brian Watson

    02/07/2013 12:45 BST

    My needs are URGENT now and I'm willing to pay someone to get this fixed. Whatever I did yesterday totally messed things up. I've had no mail since 2:56 yesterday. No errors when attempting to connect just no mail.
    • Edited by brianwatson Tuesday, July 2, 2013 11:46 AM Latest Update
    Monday, July 1, 2013 1:26 PM
  • I finally got to the truth of this matter. My host blocks port 25 outgoing and restricts the volume of mail through their smart host to 100 messages per day. So, I now know why I was having such intermittent problems. I am angry with them because:

    1. The world at large listens on port 25 for incoming mail.
    2. My server hosted with them cannot disseminate email because they block port 25.
    3. At no time during the sales process did they mention that they block port 25.
    4. My VM set up as a dedicated Exchange Server cannot function.
    5. Their relay is very restrictive.
    6. They suggest I route to another external facility to process my mail.
    7. They gave misleading information resulted in several days lost productivity when they denied that they blocked port 25 only to later clarify that they do indeed block it outbound.

    Anyway now that I understand the challenge I wonder if anyone has a solution to route email through an external smart host in the UK at a low cost? We probably sent up to 100,000 emails per month.


    Brian Watson

    Thursday, July 4, 2013 9:55 AM