SPF (Sender Policy Framework) email authentication is a method used to prevent email spoofing. Here's how it works:

1. A domain owner publishes the information of all the mail servers that are authorized to send email on behalf of their domain in the DNS records. This is the SPF record.

2. When an incoming email is received, the receiving mail server checks the SPF record of the domain in the 'envelope from' address.

3. The server then compares the IP address of the sender to the IPs listed in the SPF record.

4. If the sender's IP is listed in the SPF record, the email passes the SPF check. If not, the email fails the SPF check.

5. Depending on the policy defined in the SPF record and the email server's configuration, the email that failed the SPF check is then marked as spam, quarantined, or rejected.

In summary, SPF email authentication helps to verify that an email comes from a server authorized by the domain owner, which helps to prevent email spoofing and phishing attacks.

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SPF (Sender Policy Framework) email authentication is a method used to prevent email spoofing. Here's how it works:

1. A domain owner publishes the information of all the mail servers that are authorized to send email on behalf of their domain in the DNS records. This is the SPF record.

2. When an incoming email is received, the receiving mail server checks the SPF record of the domain in the 'envelope from' address.

3. The server then compares the IP address of the sender to the IPs listed in the SPF record.

4. If the sender's IP is listed in the SPF record, the email passes the SPF check. If not, the email fails the SPF check.

5. Depending on the policy defined in the SPF record and the email server's configuration, the email that failed the SPF check is then marked as spam, quarantined, or rejected.

In summary, SPF email authentication helps to verify that an email comes from a server authorized by the domain owner, which helps to prevent email spoofing and phishing attacks.

Knowee AI · Accepted Answer

SPF (Sender Policy Framework) email authentication is a method used to prevent email spoofing. Here's how it works:

1. A domain owner publishes the information of all the mail servers that are authorized to send email on behalf of their domain in the DNS records. This is the SPF record.

2. When an incoming email is received, the receiving mail server checks the SPF record of the domain in the 'envelope from' address.

3. The server then compares the IP address of the sender to the IPs listed in the SPF record.

4. If the sender's IP is listed in the SPF record, the email passes the SPF check. If not, the email fails the SPF check.

5. Depending on the policy defined in the SPF record and the email server's configuration, the email that failed the SPF check is then marked as spam, quarantined, or rejected.

In summary, SPF email authentication helps to verify that an email comes from a server authorized by the domain owner, which helps to prevent email spoofing and phishing attacks.

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What does SPF email authentication actually do?

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