SPF records will not allow-list external email serversDescription Some cases would like to allow-list external email servers to use the service-now domain and request to add them to domain SPF records.ResolutionOnly ServiceNow email servers will be allowed to send emails from @service-now.com and this will not change. There is an option of using external email servers and configure them in the instances. However, you will need to use your own domain for those emails instead of using the @service-now.com domain.