How Do I Know My SPF?
The question "How do I know my SPF?" is ambiguous. SPF, or Sun Protection Factor, refers to the rating on sunscreen, while SPF, or Sender Policy Framework, is a mechanism for email authentication. Therefore, we will address both interpretations separately.
Your sunscreen's SPF is clearly printed on the product packaging. Look for a number followed by "SPF." This number indicates the level of protection against UVB rays. For example, an SPF 30 sunscreen blocks approximately 97% of UVB rays. SPF ratings are determined in a laboratory setting. For example, SPF 50 products are estimated to allow 1/50 of the sun's burning rays to get through to the skin (protects against approximately 98% of the sun's burning rays). Learn more about choosing the right SPF for your needs.
Checking Your Domain's SPF Record
To check your domain's SPF record (Sender Policy Framework), which helps prevent email spoofing, you need to use an online tool like:
These tools allow you to input your domain name and will display the current SPF record associated with it. This record specifies which mail servers are authorized to send emails on behalf of your domain. If you are unsure of your domain's SPF record or how to set it up, consult your domain registrar or email provider's documentation. Learn more about troubleshooting SPF issues.
