Inventory every legitimate sender
Before tightening policy, identify Google Workspace, website forms, CRM systems, marketing platforms, support tools and any other service authorized to send as the domain.
Email Authentication
SPF, DKIM and DMARC configuration for business email.
SPF, DKIM and DMARC are separate controls that work together. SPF identifies authorized senders, DKIM adds a cryptographic signature and DMARC evaluates domain alignment and defines how failures should be handled and reported.
DSDILLON DIAGNOSTIC EMAIL-AUTHENTICA
What is the business experiencing?
Your domain has incomplete, conflicting or unverified email authentication and you need it configured without disrupting legitimate senders.
Evidence before actionDSD
Commercial consequence
Why this problem deserves a proper diagnosis.
01
A broken SPF record can cause legitimate sources to fail authentication.
02
Missing DKIM removes an important cryptographic identity signal.
03
An aggressive DMARC policy deployed too early can reject legitimate business mail.
REAL DNS DIAGNOSTIC PUBLIC RECORDS
Business Email Health Check
See whether your domain has the email records inbox providers expect.
Enter a company domain. DSDillon will inspect publicly available MX, SPF, DMARC and nameserver records in real time. No mailbox password is required.
This diagnostic reads public DNS only. It does not access email contents or private accounts.READYWaiting for a domain
Build alignment deliberately
Authentication is useful when the visible From domain aligns with the identities validated by SPF or DKIM. That relationship matters more than the presence of three DNS records.
Move DMARC policy carefully
Monitoring can reveal legitimate services that are not aligned. Enforcement should follow evidence rather than a copied p=reject record.
Speak with DSDillon
Bring us the problem as it exists now.
Call +1 (302) 339-1954, message us on WhatsApp or send a detailed inquiry. You do not need to diagnose the cause before contacting us.