How to set up an SMTP relay with Circuit ID

SMTP relay settings for Circuit ID

To set up an SMTP relay for Circuit ID, you must have the following:

• A user who has an Exchange Online mailbox
• The SMTP set to port 587
• Transport Layer Security (TLS) encryption enabled
• The mailbox server name

Step 1: Obtain the SMTP server setting

To obtain the SMTP server setting, follow these steps:

1. Sign in to Outlook Web App.
   
2. Perform the following:
   • Click Options, and then click See All Options.
   • Click Settings and then click Options.
     
3. Take one of the following actions:
   • In the left navigation pane, click Account, click My Account, and then, in the Account Information area, click Settings for POP, IMAP, and SMTP access.
   • In the left navigation pane, click Account, and then click Settings for POP and IMAP access.
     
4. Note the SMTP server setting information that’s displayed on this page.
   

Step 2: Set up Internet Information Services (IIS)

To set up Internet Information Services (IIS) so that your LOB programs can use the SMTP relay, follow these steps:

a. Create a user who has an Exchange Online mailbox. To do this, use one of the following methods:

• Create the user in Active Directory Domain Services, run directory synchronization, and then activate the user by using an Exchange Online license.Note The user must not have an on-premises mailbox.
• Create the user by using Circuit ID’s ITCloudSuite portal, and then assign the user an Exchange Online license. Note The given suite does not have to be Junior, it may vary depending on services required.
  

b. Set up the IIS SMTP relay server. To do this, follow these steps:

1. Install IIS on an internal server. During the installation, select the option to install the SMTP components.
2. In Internet Information Services (IIS) Manager, expand Default SMTP Virtual Server, and then click Properties.
3.  Click the Access tab, and then click Relay.
4. In the Select which computers may relay through this virtual server area, click Only the list below, and then enter the IP addresses of the on-premises LOB devices and application servers that will relay   through the SMTP server.Warning Make sure that you enter only the IP addresses of the devices and servers that you trust. This setting lets mail that’s coming from these sources be relayed to any destination. In effect, this makes the on-premises server that is running IIS an open relay.
5. On the Access tab, click Authentication, make sure that the Anonymous access check box is selected, and then click OK.
6. Click the Delivery tab, and then, under Smart host, enter the fully qualified domain name (FQDN) of the SMTP server from step 2a.
7. On the Delivery tab, click Outbound Connections.
8. In the TCP Port box, type 587, and then click OK.
9. On the Delivery tab, click Outbound Security, and then take the following actions:
   i. Click Basic Authentication.
   ii. In the User name box, type the user name of the Circuit ID user.
   iii. In the Password box, type the password of the Circuit ID user.
   iv. Click to select the TLS encryption check box, and then click OK.

After following the above steps, you have now successfully setup an SMTP relay with Circuit ID.