DMARC, SPF & Email Authentication Services for Canadian Businesses
Protect your organization from email spoofing, phishing, domain impersonation, and business email compromise with TEKYHOST managed DMARC services powered by PowerDMARC.
Whether you use Microsoft 365, Google Workspace, Zimbra, or a hybrid email environment, TEKYHOST helps you implement, monitor, and enforce email authentication without disrupting legitimate business email.
Why DMARC Matters
Cybercriminals frequently impersonate legitimate organizations to steal credentials, distribute malware, redirect payments, and conduct business email compromise attacks.
Without properly configured email authentication, attackers may be able to send messages that appear to come from your company’s domain.
DMARC, which stands for Domain-based Message Authentication, Reporting and Conformance, helps prevent unauthorized use of your domain while improving visibility into legitimate and unauthorized email sources.
Email impersonation can be used to:
- Steal employee or customer credentials
- Distribute malware and ransomware
- Redirect invoice and payment transactions
- Impersonate executives or finance personnel
- Damage your company’s reputation
- Reduce trust in legitimate business email
Common Problems We Find
Many organizations believe their email environment is protected but still have configuration gaps that allow spoofing, authentication failures, or poor deliverability.
- Missing or incorrectly configured DMARC records
- DMARC policies left at monitoring mode indefinitely
- SPF records exceeding the permitted DNS lookup limit
- Legitimate third-party sending platforms not authorized
- DKIM signing not enabled for business domains
- No visibility into spoofing or impersonation attempts
- Multiple conflicting SPF or DMARC records
- Email authentication changes made without proper testing
TEKYHOST Managed DMARC Services
TEKYHOST manages the complete email authentication process, from initial assessment and DNS configuration through monitoring, remediation, and DMARC enforcement.
DMARC Deployment
- Existing DMARC configuration review
- DMARC record creation
- DNS configuration assistance
- PowerDMARC tenant onboarding
- Safe monitoring-mode deployment
SPF Management
- SPF record analysis and optimization
- Authorized sender validation
- Third-party email service integration
- DNS lookup limit reduction
- SPF flattening where appropriate
DKIM Configuration
- Microsoft 365 DKIM setup
- Google Workspace DKIM setup
- Zimbra DKIM configuration
- Third-party sender DKIM validation
- DKIM alignment testing
Continuous Monitoring
- DMARC aggregate report analysis
- Email source identification
- Authentication failure monitoring
- Spoofing and impersonation visibility
- Ongoing policy recommendations
Policy Enforcement
- DMARC policy tuning
- Quarantine policy implementation
- Reject policy deployment
- Legitimate sender remediation
- Post-enforcement monitoring
Managed Reporting
- Authentication status summaries
- Domain protection reporting
- Sender and source analysis
- Executive-friendly findings
- Remediation recommendations
Additional Email Security Services
DMARC is an important part of email security, but it is not the only control needed to protect your domain and email communications.
MTA-STS
Help protect email transport against downgrade and man-in-the-middle attacks by instructing supported mail servers to require secure TLS connections.
TLS-RPT
Receive reporting about email transport encryption failures, certificate issues, policy problems, and unsuccessful secure-delivery attempts.
BIMI Readiness
Prepare your domain to display a verified company logo in supported email clients while strengthening brand trust and recognition.
Supported Email Platforms
TEKYHOST can implement and manage email authentication across cloud, on-premises, and hybrid messaging environments.
How Managed DMARC Implementation Works
We use a controlled, phased approach designed to protect legitimate email flow while gradually strengthening domain enforcement.
Assessment
We review your DNS records, mail platforms, sending services, SPF configuration, DKIM status, and current DMARC policy.
Monitoring
We deploy or update DMARC in monitoring mode and identify legitimate and unauthorized email sources.
Remediation
We correct authentication gaps, authorize approved senders, configure DKIM, and optimize SPF records.
Enforcement
Once legitimate services are validated, we safely move toward quarantine or reject enforcement and continue monitoring.
Compliance and Cyber Insurance Readiness
Email authentication can support broader cybersecurity, compliance, vendor-risk, and cyber-insurance requirements.
PHIPA
Strengthen safeguards around communications involving personal health information.
PIPEDA
Support reasonable security controls for protecting personal information.
NIST CSF
Improve protective controls, visibility, monitoring, and response capabilities.
CIS Controls
Support secure configuration and protection of email and communication systems.
Why Choose TEKYHOST?
TEKYHOST is a Canadian Managed Security Services Provider helping organizations protect their email, identities, endpoints, cloud environments, and business systems.
Our team manages the complete DMARC lifecycle, from assessment through enforcement, while helping ensure legitimate business email continues to flow.
- Canadian-based cybersecurity and infrastructure expertise
- Managed implementation rather than software-only licensing
- Experience with Microsoft 365, Zimbra, DNS, and hybrid environments
- Safe, phased DMARC enforcement
- Ongoing monitoring and technical assistance
- Integration with broader managed cybersecurity services
Part of a complete cybersecurity strategy
TEKYHOST can combine managed DMARC with additional cybersecurity services, including:
- Microsoft 365 security management
- Managed endpoint protection
- Identity and access security
- Zero Trust and SASE solutions
- Security monitoring and incident response
- Compliance and cybersecurity assessments
Request a DMARC Security Assessment
Find out whether your domain can be spoofed, identify email authentication gaps, and receive practical recommendations for improving domain protection and deliverability.
- DMARC Review
- SPF Analysis
- DKIM Validation
- DNS Review
- Email Security Recommendations