How to configure exchange server to accept emails from all external domains.

asked 2020-09-05T07:41:19.183+00:00
Anil Kumar Singam 1 Reputation point

In addition to it I want to mention that I didn't install edge server role on exchange. Is it necessary to install edge server role on exchange. If yes what is the need for installing it. Can I configure exchange server to receive email from
all external domains without edge transport server.

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. answered 2020-09-05T08:03:18.24+00:00
    Manu Philip 14,026 Reputation points Microsoft MVP

    Edge transport role is not mandatory for your specific requirement
    Exchange server will accept SMTP connections using a receive connector that is suitable for incoming email from the internet is pre-configured by Exchange setup, so there’s no need for you to configure anything separately for the requirement you mentioned. By default, the pre-configured receive connector named 'Default Frontend SERVERNAME' is capable of serving all inbound email domains. Note that “Anonymous Users” is enabled as a permission group in this connector properties to achieve this

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  2. answered 2020-09-07T06:17:04.707+00:00
    Yuki Sun-MSFT 24,311 Reputation points

    Hi @Anil Kumar Singam ,

    Can I configure exchange server to receive email from all external domains without edge transport server.

    Yes. As mentioned by Manu, it's not mandatory to install Edge server role. The inbound mail flow with no Edge server is as follows:
    23002-noedge.png
    Reference: Mail flow and the transport pipeline-Inbound mail flow (no Edge Transport servers)

    By default, a Receive connector "Default Frontend <Mailbox server name>" to accept mail from the Internet is implicitly created upon installation of Exchange, and that would be enough to receive incoming messages as long as 1) the MX record is published properly, 2) port 25 is open for mail flow and 3) the accepted domain is added.

    As regards to configure the MX record and open the port, you may refer to the relevant sections in the blog below for more information:
    Configuring Public DNS and MX records for exchange 2013
    Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

    Regarding the accepted domain, by default, the FQDN of your forest root domain in AD is configured as an authoritative domain when installing the first mailbox server, but you can add other accepted domains as well. For more explanation about accepted domains, see Accepted domains in Exchange Server.


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