Cybersecurity Hardening (MSSP)

Email Security and Domain Spoofing Prevention

Enforce domain authenticity protocols to ensure your emails arrive in inboxes and block attackers from spoofing your brand.

Brand Exploitation via Spoofing

Missing SPF, DKIM, and DMARC settings allow scammers to send phishing emails using your exact domain name, damaging corporate credibility and delivery rates.

Company emails routed to receivers' junk folders due to missing domain authentication.
Hackers sending spoofed invoices using your company's domain name.
No reporting data to track which third-party tools are sending mail using your brand name.
Outbound mail servers missing secure TLS policies, leaving traffic open to snooping.

Defense Mandate

We secure your email flow by deploying modern domain protection mechanisms. We audit third-party sending services (Mailchimp, CRM, Helpdesk), construct valid SPF lists, establish DKIM key signings, and enforce DMARC to reject unauthorized senders.

Integration Competencies
Exchange OnlineGoogle WorkspaceDMARC AnalyzersCloudflare DNSMTA-STS ConfigDKIM Signatures

Domain Authentication Protections

Defensive layers implemented across endpoints, identities, and networks.

SPF Optimization

Building clean Sender Policy Framework rules that catalog authorized outbound mail servers without exceeding lookup limits.

DKIM Key Setup

Configuring DomainKeys Identified Mail key pairs, enabling cryptographically signed outbound email headers.

DMARC Policy Enforcement

Guiding domain settings from reporting (none) to strict quarantine and reject policies.

MTA-STS & TLS Reporting

Enforcing encrypted mail transit channels and receiving reports on transmission failures.

Our Domain Hardening Plan

Step-by-step posture alignment and active monitoring setup.

01

Log Audit

We monitor DMARC XML reports to identify all senders using your domain name.

02

Authentication Align

Configuring DKIM keys and SPF lists for your CRM, support ticket desks, and newsletter services.

03

Enforcement Mode

Moving the DMARC policy statement to 'p=reject', directing mail servers to block unauthorized emails.

Secure Domain Value

Security outcomes reducing vulnerability surface and ensuring compliance.

Higher Email Deliverability

Properly authenticated domains build trust with mail servers, ensuring your business emails bypass junk filters.

Brand Identity Security

Enforced DMARC policies prevent scammers from spoofing your domain name, protecting your customers from phishing.

Detailed Sender Telemetry

Periodic reports highlight any third-party systems or malicious servers attempting to send mail from your domain.

Email Security Solutions

Defensive implementations solving real-world identity and network exposures.

Threat Context

Fixing Email Delivery Drops

GavBit Defense Solution: Auditing DNS configurations, adding DKIM keys, and resolving SPF nesting errors to restore deliverability.

Threat Context

DMARC Reject Deployment

GavBit Defense Solution: Transitioning a customer domain from 'p=none' to 'p=reject' over 60 days to secure email channels.

Email & Domain Security FAQ

SPF lists servers authorized to send mail from your domain. DKIM signs emails cryptographically to verify they weren't altered. DMARC tells receiving servers how to handle mail that fails SPF or DKIM checks.
Yes, if configured incorrectly. We run a monitoring phase first, collecting DMARC reports for weeks to ensure all valid third-party senders (e.g. HubSpot, Mailchimp) are authorized before enforcing quarantine or reject rules.

Request Security Assessment

Connect with a security engineer to coordinate baseline audits.

Email & Domain Security Audit Request

Specify your technical challenges below to coordinate with our operations desk.