Service Scenario
from noisy email risk to clean domain authentication.
A small scoped project for businesses using custom-domain email without clear SPF, DKIM, or DMARC ownership.
A small business uses Microsoft 365, newsletters, invoicing software, and a CRM. SPF records are messy, DKIM is inconsistent, DMARC reports are unread, and nobody wants to break legitimate email by moving too fast.
Kastro inventories legitimate senders, reviews DNS records, sets up monitoring, and prepares a safe path from visibility to stronger DMARC enforcement.
how we did it.
Review SPF, DKIM, DMARC, MX, and known sending services
Set up baseline monitoring and report aggregation where appropriate
Separate legitimate senders from suspicious or obsolete sources
Prepare DNS changes with rollback notes
Move toward stricter DMARC policy only when alignment is understood
Impact & metrics
3
Auth Layers
SPF, DKIM, and DMARC reviewed together
On
Monitoring
Reports become something a small team can act on
Lower
Risk
Spoofing visibility improves without breaking mail
Small
Scope
A bounded hardening sprint, not a platform migration
ready to make the next decision clearer?
Start with a bounded review. Send the invoices, vendors, renewals, and worries, and Kastro will turn them into practical next steps.