SPF, or Sender Policy Framework, is a security measure that helps protect against email spoofing. It is a DNS record that specifies which mail servers are authorized to send emails on behalf of your domain. Adding SPF to your DNS record can help prevent unauthorized users from using your domain to send spam or phishing emails.
To add SPF to your DNS record, you will need to create a TXT record that includes a list of the mail servers authorized to send emails on behalf of your domain. The SPF record should include the "v=spf1" tag, followed by a list of the authorized mail servers' IP addresses or domain names. For example, if your mail server has an IP address of 220.127.116.11, your SPF record might look like this:
v=spf1 ip4:18.104.22.168 -all
Several other tags can be used in an SPF record, such as "a" for A records, "MX" for MX records, and "include" for including other SPF records. It is important to carefully construct your SPF record to ensure that it accurately reflects the servers authorized to send emails on behalf of your domain.
Once you have created your SPF record, you need to add it to your DNS configuration. This process will vary depending on your DNS provider but typically involves logging into your account and adding the SPF record to your DNS zone file.
Adding SPF to your DNS record can help protect your domain from being used for spam or phishing campaigns. This can improve the deliverability of your legitimate emails and help protect your reputation and prevent your domain from being blacklisted. So if you haven't done so, consider adding SPF to your DNS record to help protect your domain and improve your email security.