DKIM stands for DomainKeys Identified Mail. It's an email validation system that works by authenticating email messages with digital signatures. These signatures are then used to verify the message's integrity and sender. DKIM is designed to help protect email users from spam, phishing, and other email-based threats. When an email is sent, DKIM adds a digital signature to the message. This signature is then verified by the receiving email server before the message is delivered. If the signature is not valid, the message will be marked as spam or rejected outright.

1) DKIM adds a layer of security to email communications. By verifying that an email message has not been tampered with during transit, DKIM helps to protect against spoofing and phishing attacks.

2) DKIM also allows organizations to take responsibility for the messages they send. This can be useful for managing reputation and ensuring that only authorized messages are sent from an organization's domain.

3) DKIM can improve deliverability of email by helping to ensure that messages are not caught in spam filters.

4) Finally, DKIM provides a way for organizations to track and monitor the email they send, which can be useful for troubleshooting and analytics.

There are two primary types of DKIM: Domain-level DKIM and Selector-level DKIM.

Domain-level DKIM is the more common of the two, and it involves signing all messages from a given domain with a single DKIM key. This key is typically published in the DNS records for the domain, making it easy for receiving mail servers to verify the signature. Selector-level DKIM uses multiple DKIM keys, each of which is associated with a different selector. Selectors are usually used to sign messages from specific mail servers or email programs, making it easier to rotate DKIM keys without affecting the overall delivery of messages from a given domain.

DKIM is an email security standard that allows recipients to verify that an email was sent by the rightful owner of the domain. It works by adding a digital signature to outgoing emails that can be verified by the email recipient. This signature includes information about the sender's domain, which helps to ensure that the email hasn't been tampered with and is coming from a trusted source. DKIM can help to protect email users from spam, phishing, and other types of email-based attacks. It also helps to ensure that legitimate emails are not mistakenly marked as spam. By verifying the sender of an email, DKIM can help create a more secure and trustworthy email experience for everyone involved.

Yes, Gmail uses DKIM (DomainKeys Identified Mail) to verify that the email you receive is really from the sender. This verification process helps protect you from email spoofing and phishing attacks. DKIM uses a digital signature that's attached to each email message. When you receive an email, Gmail checks the signature against a list of keys published by the sender's domain. If the signature matches one on the list, then Gmail knows that the email is most likely legitimate. If there isn't a match, or if there's no signature at all, Gmail marks the email as unverified.