Exchange relay setup

This is likely the IP address of the Mailbox server where the Receive connector is defined. This relates to the Network adapter bindings property or the Bindings parameter value that you configured on the connector. You'll need to use the valid value for your environment. In this example, we'll use Sender's email address : You'll probably configure the servers or devices that are anonymously relaying mail to use a sending email address that's in an authoritative domain for your organization.

In this example, we'll use chris contoso. Recipient's email address : Use a valid email address. In this example, we'll use kate fabrikam. If you receive the response 2. Continue to the next step to finish sending the test message.

If you receive the response 5. If this happens, do the following:. If anonymous relay works intermittently, you may need to modify the default message rate and throttling limits on the Receive connector.

For more information, see Message throttling on Receive connectors. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Is this page helpful? Please rate your experience Yes No. Any additional feedback? This is because mail. Add users and domain to Office In the Microsoft Admin Center, click Setup , and then click Domains to see the list of domains that are registered.

If your organization uses Exchange Server for its on-premises server, configure the server to send messages over TLS. To do this, see Set up your email server to relay mail to the Internet via Office If you've already used Hybrid Configuration Wizard, you can continue to use it.

However, make sure that you use a certificate that matches the criteria that's outlined in Step 1, sub-step 5 of this section. Install a certificate in your on-premises environment. For more information about how to address the connector setting requirement, see Important connector notice. For more information about how to relay messages through Office , see the " Setting up mail flow where some mailboxes are in Office and some mailboxes are on your organization's mail servers " section of Mail flow best practices for Exchange Online and Office Still need help?

Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Skipping this step can cause email to be sent to recipient Junk Email folders.

To test the configuration, send a test email from your device or application, and confirm that it was received by the recipient. If your devices or applications are capable of using a certificate for mail flow, you can configure a certificate-based connector to relay email through Microsoft or Office To do this task, verify the subject name on the certificate used by the sending device or application. The common name CN or subject alternative name SAN in the certificate should contain a domain name that you have registered in Microsoft or Office Also, you must create a certificate-based connector in Microsoft or Office with this same domain name to accept and relay emails coming from these devices, applications, or any other on-premises server.

For more information about this method, see important notice for email customers who have configured connectors. In the following diagram, the application or device in your organization's network uses a connector for SMTP relay to email recipients in your organization. The Microsoft or Office connector that you configure authenticates your device or application with Microsoft or Office using an IP address. Your device or application can send email using any address including ones that can't receive mail , as long as the address uses one of your domains.

It is not mandatory for the email address to be associated with an actual mailbox. For example, if your domain is contoso. Microsoft or Office SMTP relay uses a connector to authenticate the mail sent from your device or application. This authentication method allows Microsoft or Office to relay those messages to your own mailboxes and external recipients. Microsoft or Office SMTP relay is similar to direct send except that it can send mail to external recipients.

Due to the added complexity of configuring a connector, direct send is recommended over Microsoft or Office SMTP relay, unless you must send email to external recipients. If you happen to have an on-premises email server, you should seriously consider using that server for SMTP relay instead of Microsoft or Office A local email server that you have physical access to is much easier to configure for SMTP relay by devices and applications on your local network.

The details about how to do this configuration depends on your on-premises email server. For Exchange Server, see the following articles:. Fix issues with printers, scanners, and LOB applications that send email using Microsoft or Office Set up connectors to route mail between Microsoft or Office and your own email servers.

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Any additional feedback? We do this to future proof our design by abstracting the service we create from the machine name delivering the service.

Consider a branch office scenario in Seattle with an Exchange server which we would like to upgrade to Exchange The Exchange Server architecture deploys Exchange servers as a single building block , containing front end and back end roles.

Front End Transport and Transport services are co-located on the same server. When you install a new Exchange server, several receive connectors are created, including the default receive connector to allow Exchange to receive email from the internet.

In the Exchange Admin Center navigate to mail flow and then receive connectors. Select the server that you want to view the receive connectors:.

We are going to create a dedicated received connector for anonymous relay from specific internal IP addresses. This is a better idea than modifying the default receive connector configured to receive email from the internet. Not modifying the default receive connectors prevents servers from inadvertently becoming open relays. In our lab, our internal address range is