SPF filtering is a common anti-spam measure among email providers and is designed to prevent your emails to be marked as spam. Prevent email spoofing and secure your domain by adding SPF records to your DNS.
Email spoofing is when scammers send emails that appear to come from your domain with a fake reply-to address. The same phrasing, email template, and signatures make the messages appear legit and are designed to mimic your regular emails. Users are prone to phishing attacks when replying to the fake reply-to address and their sensitive information can be stolen.
SPF – Sender Policy Framework – is an email validation system designed to prevent spam by detecting email spoofing. SPF records are TXT files that allow senders to include which hosts are authorized to send emails on behalf of their domain.
Head over to your DNS hosting provider and edit or create a new SPF record and specify which hosts are allowed to send emails on behalf of your domain.
Edit or add the following SPF record in your DNS to authorize 123 Form Builder:
v=spf1 include:_spf.123formbuilder.com include:customeriomail.com include:_spf.google.com include:mail.zendesk.com -all
Note: You do not need to set this up if you are using the default 123 Form Builder address (firstname.lastname@example.org). If you have connected your SMTP server on your forms, SPF filtering is not required.