Email Authentication & Domain Protection
Your business domain is more than a web address, it represents your identity, your communications, and the trust customers place in your organization.
Cybercriminals frequently attempt to impersonate trusted businesses through phishing, spoofing, fraudulent invoices, credential theft, and other email-based attacks. Without properly configured email authentication, recipients may have difficulty determining whether a message claiming to come from your organization was actually authorized by you.
AVARA Cyber Solutions helps organizations strengthen their email and domain security through the implementation, assessment, and monitoring of essential email authentication technologies.
SPF • DKIM • DMARC
Together, these controls help establish trust in legitimate email, reduce opportunities for unauthorized domain impersonation, improve visibility into how your domain is being used, and support a stronger email security posture.
SPF
Sender Policy Framework
SPF answers the question: “Is this server authorized to send email for this domain?”
SPF allows a business to publish information in its DNS identifying the mail servers and services authorized to send email on behalf of its domain.
When a receiving email system receives a message, it can evaluate whether the sending infrastructure is authorized according to the domain's SPF policy.
If these services are not properly accounted for, legitimate email can experience authentication problems. At the same time, an improperly maintained SPF configuration can weaken your overall email authentication posture.
SPF establishes who is authorized to send.
DKIM
DomainKeys Identified Mail
DKIM answers the question: “Can this message be cryptographically associated with an authorized sending domain?”
DKIM adds a cryptographic signature to outgoing email.
The sending system signs selected portions of the message using a private key. The corresponding public key is published in the organization's DNS.
Receiving mail systems can use that public key to verify the signature.
Email often travels through multiple systems before reaching its destination. DKIM provides an authentication signal that helps receiving systems verify that a domain took responsibility for signing the message and that signed portions of the message have not been improperly modified after signing.
For businesses, this provides an important additional layer of trust beyond simply identifying the sending server.
DKIM adds cryptographic identity and integrity.
DMARC
Domain-based Message Authentication, Reporting & Conformance
DMARC answers the question: “Does this message authenticate in a way that aligns with the domain the recipient sees?”
DMARC brings SPF and DKIM together and adds something extremely valuable for businesses:
policy, alignment, and visibility.
DMARC evaluates whether authenticated SPF or DKIM identities align appropriately with the domain shown to the recipient in the email's From address.
DMARC can also provide reporting that gives organizations visibility into systems sending email using their domain.
Without DMARC, a business may have SPF and DKIM configured but still lack centralized visibility into how its domain is being used across legitimate and potentially unauthorized email sources.
DMARC turns email authentication into a manageable domain-protection strategy.
