Email DKIM (DomainKeys Identified Mail) is an email authentication method designed to verify that an email message sent from your domain is legitimate and has not been tampered with during transmission. For small businesses, DKIM works by adding a digital signature to your email headers, which is tied to your domain’s DNS records. When a recipient’s email server receives your email, it checks this signature against the public key stored in your domain’s DNS records. If the signature matches, it confirms that the email was indeed sent by you and hasn’t been altered, ensuring the integrity of the communication. For small businesses, using DKIM is especially important when sending out marketing emails, invoices, or communication with clients. It protects your business’s reputation and builds trust with recipients by ensuring that emails are authentic and secure. 

Enhances Email Security: DKIM helps protect against email spoofing and phishing, reducing the chances that malicious actors can impersonate your business to deceive customers or partners.

Improves Email Deliverability: Many email providers, such as Gmail and Outlook, use DKIM as a factor in determining whether an email is legitimate. Emails without DKIM are more likely to end up in spam folders, reducing the effectiveness of your communications.

Builds Trust and Credibility: By signing your emails with DKIM, you show customers and partners that your communications are secure and trustworthy, helping to maintain your business's reputation.

Prevents Fraudulent Activities: By verifying that your email hasn't been altered, DKIM helps prevent the use of your domain for malicious purposes, like sending fake invoices or fraudulent messages.

Ensures Compliance with Industry Standards: Many email service providers and security frameworks expect DKIM as part of good email hygiene, ensuring your business meets industry standards for email security.