Lambda Solutions provides email relay services for your LMS. In order for the service to function with a custom domain a TXT record is required. This is to verify Lambda's email service as a valid sender on behalf of your domain.
Lambda Domain Verification TXT Records
Your domain is associated with a set of Domain Name System (DNS) records that you manage through your DNS provider. A TXT Record is a type of DNS record that provides additional information about your domain. Each TXT record consists of a name and a value.
Lambda will initiate domain verification by providing you the name and value to use for the TXT record. For example, if your domain is example.com, the TXT record settings that Lambda will generate will look similar to the following example:
Add a TXT record to your domain's DNS server using the specified Name and Value. The domain verification is complete when Lambda detects the existence of the TXT record in your domain's DNS settings.
If your DNS provider does not allow DNS record names to contain underscores, you can omit _amazonses from the Name. In that case, for the preceding example, the TXT record name would be example.com instead of _amazonses.example.com.
To make the record easier to recognize and maintain, you can also optionally prefix the Value with amazonses:.
In the previous example, the value of the TXT record would therefore beamazonses:pmBGN/7MjnfhTKUZ06Enqq1PeGUaOkw8lGhcfwefcHU=.
Each DNS provider may have slightly different steps required to enter in a TXT record to the domain. Here are some of the more popular domain providers and their required steps.
If you have any additional concerns are questions about setting up a TXT record in your DNS to use Lambda's email service, you can submit a support ticket at https://techsupport.lambdasolutions.net/