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Once a domain has been added, test to make sure your mail server will accept email from SpamTitan Cloud. While logged into SpamTitan Cloud as Domain Group Administrator, follow these steps:
Go to Settings > Relay Settings and click the check icon
in the Options column for the domain you want to test.
In the Send Test Email dialog box, enter a valid email address and click Send.
Verify the email has been delivered to the specified email address.