5-day turnaround · fully async · one sending domain
Why this matters now
Since 2024, the inbox providers stopped treating bulk-sender rules as suggestions.
Google & Yahoo (Feb 2024): enforced SPF + DKIM + DMARC, one-click unsubscribe, and a spam-rate ceiling for high-volume senders.
Microsoft / Outlook (May 2025): joined them, applying the same authentication baseline to bulk senders.
Authentication and alignment problems that used to cost a few points of open rate now route mail to spam or reject it outright. For a sponsored newsletter, that's a direct hit to the number your advertisers pay for.
What gets checked
SPF: record validity and the 10-DNS-lookup limit (the most common silent failure).
DKIM: key presence, selector configuration, and key strength.
DMARC: policy level, alignment mode, and reporting setup.
MX: mail routing sanity and consistency with your sending story.
MTA-STS & TLS-RPT: enforced-TLS policy correctness and failure reporting.
Blocklists: your sending domain and IPs against the reputation lists that matter.
Real send-header analysis: I read the full headers of an actual message from your ESP and confirm what passes at the inbox, not just what your DNS claims. Most audits stop short of this.
What you get
A scored findings report: a document you can act on or hand to whoever manages your DNS.
Every finding ranked by deliverability impact: what's costing you placement today vs. what's merely untidy.
Exact DNS fixes: the specific records to add or change, written out.
A plain-English read on your posture and the one or two things that move the needle most.
No dashboard to learn. No portal login. A document that tells you what's wrong and how to fix it.