Now Accepting Clients — US & UK

B2B Email Deliverability
& DNS Remediation.

We audit and repair your DMARC, SPF, and DKIM infrastructure so your cold outreach reaches inboxes — not spam folders. Built for US and UK SaaS companies operating at scale.

Get Your Free Domain Audit → Book a 15-Min Call
85% - 95%
Inbox placement achievable with full authentication — industry benchmark
48 - 72 hrs
Typical DNS remediation window including propagation
0
Client emails read. Ever. We touch DNS records, not your inbox.
// Diagnosis

The 2026 Sender Mandate Is Not Optional.

Google and Yahoo's 2026 enforcement cycle introduced strict DMARC-at-enforcement policies for bulk and transactional senders. Misconfigured SPF flattening, overlapping DKIM selectors, and absent p=reject policies are now hard-blocking reasons for deliverability failure.

Why Your Emails Are Failing

  • SPF PermError / Too Many DNS Lookups
    The 10-lookup limit is routinely exceeded when multiple ESPs are chained. Results in immediate SPF failure.
  • DMARC at p=none (No Enforcement)
    A policy of p=none means spoofed emails sail through. Google now downgrades sender reputation on detection.
  • Misaligned DKIM Selectors
    Third-party platforms (Outreach, Lemlist, Apollo) signing with their own domains break DMARC alignment entirely.
  • Absent rua/ruf Reporting
    Without aggregate reporting, you are blind to authentication failures across your ESP vendor stack.
  • Blacklisted Sending IPs
    If your IP is on Spamhaus or Barracuda, Gmail blocks your email before SPF or DKIM is even evaluated. Most companies never check.
  • Unprotected Sending Subdomains
    Subdomains like mail.company.com or outreach.company.com that exist without their own DMARC record are freely spoofable — even with a strong parent policy.

2026 Compliance Baseline

  • DMARC policy at p=quarantine minimum
  • SPF record flattened to stay under 10 DNS lookups
  • DKIM 2048-bit key with aligned sending domain
  • Aggregate DMARC reporting rua configured
  • Google Postmaster Tools verified & monitored
  • Unsubscribe header (RFC 8058) present for bulk sends
  • Spam complaint rate kept below 0.08% threshold

Source: Google Bulk Sender Guidelines (Feb 2024, enforced 2026 cycle) & Yahoo Sender Requirements.

// Live audit output — Vaixus Audit Engine v3.0.0 / 10-point infrastructure check
vaixus_audit.py v3.0.0 — 10-point check 
# Vaixus Technologies — DNS Deliverability Audit Engine v3.0.0
# 10-Point Infrastructure Check | soorya@vaixus.tech
# Target: example-saas.io (anonymised — illustrative output)

domain = "example-saas.io"

── [1/10] SPF ──────────────────────────────────────────────
WARN     SPF lookup count: 13 / 10 — RFC 7208 PermError triggered
FAIL     Nested loop: _spf.hubspot.com → _spf.google.com detected
FAIL     Qualifier ~all (SoftFail) — must be upgraded to -all

── [2/10] DKIM ─────────────────────────────────────────────
PASS     google._domainkey → 2048-bit RSA ✓
FAIL     k1._domainkey → NXDOMAIN — selector missing from DNS
FAIL     Lemlist d= lemlist-outbound.com ≠ example-saas.io — alignment FAIL

── [3/10] DMARC ────────────────────────────────────────────
FOUND    v=DMARC1; p=none; rua=mailto:dmarc@example-saas.io
CRITICAL p=none — zero enforcement, spoofed mail passes freely
WARN     sp= not set — subdomains inherit p=none by default

── [4/10] MX + PTR (Reverse DNS) ───────────────────────────
PASS     MX 10: mail.example-saas.io → 198.51.100.42
FAIL     PTR 198.51.100.42 → NXDOMAIN — no reverse DNS
NOTE     Missing PTR causes Microsoft Outlook deferral

── [5/10] BIMI ─────────────────────────────────────────────
MISSING  default._bimi.example-saas.io → NXDOMAIN
INFO     Fix DMARC first — BIMI requires p=quarantine minimum

── [6/10] BLACKLIST CHECK (15 RBLs) ────────────────────────
LISTED   198.51.100.42 on zen.spamhaus.org (SBL+XBL)
LISTED   198.51.100.42 on b.barracudacentral.org
CLEAN    13 / 15 RBLs clear

── [7/10] MTA-STS / TLS-RPT ────────────────────────────────
MISSING  _mta-sts record — no inbound TLS enforcement
MISSING  _smtp._tls record — no TLS failure reporting

── [8/10] CATCH-ALL DETECTION ──────────────────────────────
WARN     Catch-all enabled — all addresses accepted
NOTE     Inflates bounce rates, degrades sending reputation

── [9/10] SUBDOMAIN GAPS ───────────────────────────────────
EXPOSED  mail.example-saas.io — active, no DMARC record
EXPOSED  outreach.example-saas.io — active, no DMARC record

── [10/10] HEALTH SCORE ────────────────────────────────────
SCORE    18 / 100 — GRADE F: CRITICAL
PRIORITY Blacklist removal → SPF flatten → DMARC enforce → DKIM re-key
ETA      48–72 hrs full remediation with registrar access

$
// Scope of Work

What We Actually Do.

No bloated agencies. No project managers. One specialist, your DNS panel, and a systematic remediation protocol executed with precision.

Deep DNS Audit

  • Full SPF record tree expansion and lookup count analysis
  • DKIM selector inventory across all ESP vendors
  • DMARC policy assessment and alignment verification
  • MX, PTR, and reverse-DNS validation for sending IPs

Vendor Alignment

  • Custom DKIM key provisioning per ESP (Lemlist, Apollo, Outreach, HubSpot)
  • Sending domain alignment per vendor (subdomain strategy)
  • SPF record consolidation using macro flattening
  • Documented IP allowlisting with sending volume caps

Policy Enforcement

  • Graduated DMARC migration: none → quarantine → reject
  • Subdomain policy isolation to prevent scope creep
  • RFC 8058 List-Unsubscribe header deployment validation
  • Pre-enforcement simulation with percentage rollout testing

Postmaster Monitoring

  • Google Postmaster Tools domain registration and verification
  • Spam rate dashboard baseline establishment (target: <0.08%)
  • DMARC aggregate report parsing and anomaly alerting
  • 30-day post-remediation health report with deliverability metrics

Blacklist & Transport Security

  • IP reputation check across 15 major RBL databases
  • Spamhaus SBL/XBL/PBL and Barracuda BRBL verified
  • MTA-STS and TLS-RPT transport encryption validated
  • Catch-all detection and subdomain spoofing gap analysis

Health Score & Roadmap

  • Weighted 0–100 score across all 10 infrastructure checks
  • A–F grade with plain-English explanation for non-technical founders
  • Prioritised roadmap: Critical → High → Medium → Low
  • PDF report delivered within 24 hours of domain submission
// Pricing

Transparent. Fixed. No Surprises.

Two service tiers. Payment via Paddle (card) or wire transfer. All fees invoiced under Vaixus Technologies, Tiruppur, India. A service agreement is provided before any payment is collected.

Tier 01

DNS Deliverability Audit

$149 USD / one-time
Introductory rate — rises to $500 after initial cohort
  • 10-point infrastructure audit: SPF, DKIM, DMARC, MX/PTR, BIMI, 15 blacklists, MTA-STS, catch-all, subdomain gaps, health score
  • ESP vendor stack analysis (up to 6 platforms)
  • Blacklist check across 15 major RBL databases (Spamhaus, Barracuda + 13 more)
  • Scored health report (0–100) with prioritised remediation roadmap — PDF delivered
  • 1 × 30-min walkthrough call — findings reviewed together
  • Hands-on DNS implementation (upgrade to Tier 02)
Start with an Audit — $149

Not sure yet? Get a free preliminary finding first →

Recommended
Tier 02

Full Infrastructure Remediation

$1,500 USD / one-time
Includes full Audit + hands-on DNS implementation
  • Everything in Tier 01 Audit
  • Direct DNS record implementation (registrar access)
  • DKIM key generation and rotation across all ESPs
  • Graduated DMARC enforcement migration (none→reject)
  • Google Postmaster setup + 30-day monitoring report
  • 3 × post-deployment check-ins (14d, 30d, 60d)
Start Remediation — $1,500
Ongoing Monitoring Retainer — $150/month
DNS infrastructure drifts as you add ESPs and tools. Optional monthly retainer covers weekly domain health checks, DMARC report parsing, and proactive alerts before problems affect deliverability.
Ask about retainer

All fees are non-refundable once the audit and deployment process has commenced. See our Refund Policy. A service agreement is provided before payment. Vaixus Technologies acts as technical advisor and executor — client is responsible for providing registrar access.

// How to Work With Us

Start With Your Domain.

Before the first call, share your primary sending domain. We run a preliminary audit and arrive with your specific findings ready — no generic presentations.

Book a 15-Minute Diagnostic Call
Prefer a live conversation? Book a slot. We'll review your domain findings together on the call and answer any questions before you commit to anything.
via Calendly → calendly.com/vaixus
Submit Domain — Get Free Findings
No call required. Fill in your domain and tools in 60 seconds. We run the 10-point audit and email you the findings within 24 hours — zero obligation.
vaixus.tech/audit →
What happens after you reach out:
1
Share your domain
Just your primary sending domain
2
We run the audit
SPF, DKIM, DMARC — within 24 hours
3
Review findings
Call or written report — your choice
4
Scope & payment
Agreement first, payment after you agree
// Who Builds This
Soorya S.V. — Vaixus Technologies

Soorya S.V.

Founder, Vaixus Technologies

I built Vaixus Technologies after watching B2B sales teams spend thousands on outreach tools while their emails were quietly landing in spam — not because their copy was bad, but because their DNS infrastructure was broken.

I run Python-based domain audits, implement SPF flattening, DKIM key rotation, and graduated DMARC enforcement — then monitor the health of your domain so you can focus on closing deals rather than debugging DNS records.

LinkedIn soorya@vaixus.tech
// Next Step

Your Emails Deserve to Be Delivered.

Share your domain. We'll run a preliminary audit before any call or commitment. No generic pitch — just your specific infrastructure findings.

Get Your Free Domain Audit → Book a 15-Min Call