How SPF works
Posted: Thu Feb 13, 2025 6:38 am
Authenticates your email by helping you publish a list of authorized senders. So if "1.12.1.11" is a legitimate sender IP for your email, you can add it to your SPF record. This will help the receiving server identify email received from that france phone number list and your domain as legitimate. Subsequently, email sent from IP addresses outside the range of your SPF record will be treated as suspicious. Domain owners publish SPF records in their DNS, which contain the IP addresses of all authorized email senders. This enables the SPF protocol. The recipient's email server queries this SPF record to confirm whether the mail server is authorized for the sending domain. If it is authorized, SPF will pass, otherwise the message will fail.
How DKIM works
DKIM uses digital signatures (cryptography) to sign emails and ensure that they remain unchanged throughout the delivery process. DKIM helps prevent man-in-the-middle attacks, where an attacker intercepts email communications to change the content of the message. It also helps verify legitimate messages in email forwarding scenarios where SPF fails. 2 DKIM key pairs are generated by the domain owner when implementing DKIM. The public key is published on the DNS, and the private key can only be shared with the ESP responsible for signing outgoing messages. Once you send an email from your domain, your signer uses the private key to create an encrypted value for your message body and append it to the message header. The receiving server can then verify this signature by comparing it to your public key. If they match, your email passes DKIM.
How DMARC works
DMARC is an email authentication protocol that helps domain owners control how unauthorized mail is handled. DMARC allows you to take strict action (if you wish) on mail that fails SPF or DKIM validation checks. To configure DMARC, you need to implement SPF or DKIM. If you configure both protocols, then your mail must pass either of these checks in order to pass DMARC.
It's your decision how to handle messages that fail SPF or DKIM. If you configure a policy of "None", no action will be taken. If you configure a "Quarantine" policy, your emails will be placed in the recipient's quarantine folder. If you choose "Reject", emails that fail validation will be discarded.
In addition to the SPF, DKIM, and DMARC email authentication methods, there are a few other protocols that you can benefit from:
How to Check Email Verification
There are several ways to check if an email is verified. Checking if email verification is set up is crucial to domain health. This can give you insight into how well your email is protected from cyber attacks. It can also confirm the effectiveness of an existing email verification setup.
To check if an email passes manual verification, you need to send a test email from your domain to an account you have access to. Click on the 3 dots in the upper right corner and select "Show Original". The original email headers will be displayed in a new tab. You can check SPF, DKIM and DMARC in the message summary. Scroll down to view the Details header and search for the "dkim=", "spf=" and "dmarc=" fields. This will confirm that your email is verified.
How DKIM works
DKIM uses digital signatures (cryptography) to sign emails and ensure that they remain unchanged throughout the delivery process. DKIM helps prevent man-in-the-middle attacks, where an attacker intercepts email communications to change the content of the message. It also helps verify legitimate messages in email forwarding scenarios where SPF fails. 2 DKIM key pairs are generated by the domain owner when implementing DKIM. The public key is published on the DNS, and the private key can only be shared with the ESP responsible for signing outgoing messages. Once you send an email from your domain, your signer uses the private key to create an encrypted value for your message body and append it to the message header. The receiving server can then verify this signature by comparing it to your public key. If they match, your email passes DKIM.
How DMARC works
DMARC is an email authentication protocol that helps domain owners control how unauthorized mail is handled. DMARC allows you to take strict action (if you wish) on mail that fails SPF or DKIM validation checks. To configure DMARC, you need to implement SPF or DKIM. If you configure both protocols, then your mail must pass either of these checks in order to pass DMARC.
It's your decision how to handle messages that fail SPF or DKIM. If you configure a policy of "None", no action will be taken. If you configure a "Quarantine" policy, your emails will be placed in the recipient's quarantine folder. If you choose "Reject", emails that fail validation will be discarded.
In addition to the SPF, DKIM, and DMARC email authentication methods, there are a few other protocols that you can benefit from:
How to Check Email Verification
There are several ways to check if an email is verified. Checking if email verification is set up is crucial to domain health. This can give you insight into how well your email is protected from cyber attacks. It can also confirm the effectiveness of an existing email verification setup.
To check if an email passes manual verification, you need to send a test email from your domain to an account you have access to. Click on the 3 dots in the upper right corner and select "Show Original". The original email headers will be displayed in a new tab. You can check SPF, DKIM and DMARC in the message summary. Scroll down to view the Details header and search for the "dkim=", "spf=" and "dmarc=" fields. This will confirm that your email is verified.