SPF (Sender Policy Framework)
SenderPolicyFramework (SPF) is a protocol used to prevent spammers from sending emails with forged ‘From’ addresses at your domain.
An SPF record is a type of TXT record that identifies any mail servers permitted to send emails on behalf of your domain; they are also known as Reverse MX records.
Domain administrators publish SPF records in theDomainNameSystem (DNS); this enables the incoming mail servers to verify the domain name from which emails are sent. When a recipient's mail server receives an email, it checks the SPF record to determine whether it is a valid email. If the email comes from a server that is included in the SPF record, it is legitimate; if not, it is rejected as spam.
We would recommend adding a DNS SPF record of include:spf.app.customerthermometer.com to assist with deliverability.
How do I update the SPF records?
The exact process varies from one service provider to another; generally, it involves adding one line to a DNS TXT record. Your IT Team should be able to help you with this request.