AuShield: Automatic DMARC email authentication

Email remains the primary vector of corporate fraud, and your company domain is an asset others can use against you without your knowledge. Without authentication correctly configured, an attacker can send phishing emails that appear to come from your exact address, with your company name, to your own clients. They receive a fraud. You receive the loss of trust.

The other side of the same problem is deliverability: without SPF, DKIM, and DMARC properly configured, the legitimate emails your company sends every day, newsletters, commercial communications, order confirmations, end up in recipients spam folders. The marketing team work is lost before it reaches the inbox. AuShield solves both fronts by automating domain authentication.

Your Domain as an Attack Surface: the Problem the Marketing Team Does Not See Coming

The marketing team builds brand reputation over months or years: campaigns, content, carefully crafted communications that clients associate with the company. That reputation has an email address attached to it, and that email address can be spoofed by anyone with basic email knowledge if the domain is not correctly authenticated.

The attack is called spoofing: the attacker sends an email with the From field showing the company address, the company name, and potentially even the logo if the client has sender image display configured. The client receives that email and has no way to visually distinguish it from a legitimate one. It might be an urgent payment request, a fake security alert, or an offer with a malicious link.

The consequences for the marketing team are direct: when clients receive fraud with the company name, the negative association affects brand perception even though the company had no involvement. The trust that took years to build erodes with each phishing incident that uses the company domain as a vector.

SPF, DKIM, and DMARC: the Three Protocols That Protect Your Domain

Email authentication is built on three protocols that work together. SPF, Sender Policy Framework, defines which servers are authorized to send emails on behalf of the domain. DKIM, DomainKeys Identified Mail, adds a digital signature to each email that allows the recipient to verify the message was not altered in transit. DMARC, Domain-based Message Authentication Reporting and Conformance, defines what to do with emails that fail SPF or DKIM, and generates reports on who is sending on behalf of the domain.

The problem is that correctly configuring and maintaining these three protocols is not trivial. SPF has a limit of ten DNS lookups that is easy to exceed when a company uses multiple sending services: the email marketing platform, the CRM, the support tool, the billing system. Each of those services needs to be included in the SPF record, and when the limit is exceeded, SPF starts failing silently.

DKIM requires managing cryptographic key pairs with expiration dates that must be rotated periodically. DMARC has three policy modes: none, which only monitors; quarantine, which sends unauthenticated emails to spam; and reject, which blocks them directly. Reaching reject mode safely without blocking legitimate emails in the process requires a monitoring and adjustment period that many teams never complete because it is manual, technical, and time-consuming.

AuShield: Automatic Authentication Without Permanent Manual Configuration

AuShield automates the management of SPF, DKIM, and DMARC so the marketing team does not depend on IT to keep authentication updated every time a new sending service is added. The platform automatically detects services sending on behalf of the domain, updates the corresponding records, and keeps the configuration within the technical limits of each protocol.

The SPF ten DNS lookup limit problem, one of the most common in organizations using multiple marketing tools, is solved by AuShield with automatic flattening: instead of chaining multiple includes that multiply lookups, AuShield maintains an optimized SPF record that updates when authorized services change. The marketing team can add a new sending platform without having to ask IT to check whether the limit is still valid.

For DMARC, AuShield manages the transition process from none mode to reject mode gradually and safely. It monitors DMARC reports to identify which sending sources are failing authentication before activating the block, ensuring the move to the reject policy does not block legitimate emails that were incorrectly configured.

Deliverability: the Direct Impact on Marketing Campaigns

Domain authentication is not just a security topic: it is a direct factor in email marketing campaign deliverability. The main email providers, Gmail, Outlook, Yahoo, use the sending domain reputation as one of the primary factors for deciding whether an email reaches the inbox or goes to spam. And domain reputation is directly tied to the correct configuration of SPF, DKIM, and DMARC.

Since early 2024, Google and Yahoo require DMARC authentication as a requirement for high-volume senders. A domain without DMARC configured that sends more than five thousand emails per day to Gmail users has its messages marked or rejected outright. For a marketing team that depends on email as a client communication channel, that is a direct and measurable loss of reach.

With AuShield keeping authentication correctly configured, domain reputation improves sustainably. Campaign emails reach the inbox instead of going to spam. Open rates reflect the actual campaign reach. And the marketing team can correctly attribute results instead of speculating about how many emails actually arrived at their destination.

Visibility Into Who Is Sending on Behalf of Your Domain

One of the most concrete values of AuShield for a marketing team is the visibility it offers into all sources sending emails on behalf of the domain. The DMARC reports that AuShield processes and presents show which servers are sending, from which countries, at what volume, and whether they are passing or failing authentication.

That visibility has two practical uses. The first is detecting legitimate services the team uses that are not correctly authorized in the SPF and DKIM records, which explains why some emails go to spam even though they come from sources the team controls. The second is detecting unauthorized sources sending on behalf of the domain, a clear signal the domain is being used for phishing or spam.

For a marketing manager who has to justify the investment in cybersecurity tools to leadership, that visibility is the concrete argument: it is not just “protection”, it is information about who uses the company name to send emails, with data that allows making authorization or blocking decisions.

Where Aufiero Informatica Comes In

AuShield is distributed by Aufiero Informatica, an authorized distributor with extensive experience in cybersecurity and productivity solutions for corporate teams of all sizes.

If your domain does not have DMARC configured, or has a none mode policy that never advanced to quarantine or reject, or if you are seeing company emails going to spam without understanding why, Aufiero can advise you on implementing AuShield and on the transition process toward a complete authentication policy.

Frequently Asked Questions About AuShield