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Last updated on: 2025-10-29

Email DNS Security & Deliverability
— Email & Domain Authentication Services

Quick Answer

Email DNS Security stops spoofing, phishing and deliverability issues at the root. We design and enforce SPF, DKIM & DMARC alignment, implement MTA-STS/TLS-RPT for secure transport, configure DNSSEC, CAA, BIMI, fix MX/forwarding pitfalls, and monitor DMARC reports so your brand and inbox placement stay protected.

  • Stop spoofing & imposters (DMARC quarantine/reject)
  • Improve inboxing & sender reputation
  • Enable BIMI brand logos (VMC ready)
  • 24×7 monitoring & alerting (RUA/RUF)

What we do for you

PrecisionTech brings ~30 years of email & DNS operations. We audit, fix, align and then continuously monitor—across Microsoft 365, Google Workspace, Zoho, SendGrid/SES, etc. Start with a 6-hour hardening block or engage a managed plan. Available across India and globally.

  • SPF/DKIM/DMARC design & rollout
  • MTA-STS & TLS-RPT, SMTP TLS hardening
  • DNSSEC & CAA, key rotation policies
  • DMARC analytics & threat remediation

Email & Domain security specialists supporting India & global teams with anti-spoofing, transport security and deliverability.

From phishing outbreaks to chronic spam folder issues, we tackle the root causes: misaligned SPF/DKIM/DMARC, weak TLS, broken MX/forwarding, or unmanaged third-party senders. We don’t just add a record—we architect policy, rotate keys, visualise DMARC reports, and keep watch so your domains stay trusted. Backed by decades of email & DNS experience.

How to Engage Our Email DNS Team?

Start with a 6-hour hardening & audit block for immediate risk reduction, or choose a managed plan for ongoing monitoring and response. Available across India and globally.

6-hour Email DNS Security Support — ₹9,900

Choose the right tier to secure your domains and maximise Inbox placement.

Capability Essentials Standard Advanced Enterprise
SPF design & flattening ✔✔✔✔
DKIM keys (2048-bit) & rotation policy ✔✔✔✔
DMARC setup & alignment (p=none→quarantine→reject) BasicEnhancedAdvancedAdvanced+
MTA-STS & TLS-RPT (forced TLS + failure reports) —✔✔✔
DNSSEC & CAA policies —✔✔✔
3rd-party sender onboarding (M365, Google, SendGrid, SES…) —✔✔✔
DMARC RUA/RUF parsing & threat triage —BasicAdvancedAdvanced+
BIMI readiness (SVG + VMC) ——✔✔
User-facing anti-phishing tips & SPF/DKIM check banners —✔✔✔
24×7 monitoring & incident response ——Extended24×7
Email
SPF
DKIM
DMARC
MTA-STS
TLS-RPT
BIMI
DNSSEC
ARC
MX
SPF Flatten
Microsoft 365
Google Workspace
SendGrid
AWS SES
Email SPF DKIM DMARC MTA-STS TLS-RPT BIMI DNSSEC ARC MX SPF Flatten Microsoft 365 Google Workspace SendGrid AWS SES

Looking for Email DNS security experts for your organisation?

Contact Sales for Email DNS Security

Frequently Asked Questions

What is Email DNS Security and why does it matter?
Email DNS Security is the set of DNS-level controls that prove your messages are genuine and protect your brand and recipients from spoofing and phishing. Core controls include SPF (who may send), DKIM (cryptographic signing), DMARC (alignment + policy enforcement), plus transport/auth integrity like MTA-STS/TLS-RPT, and domain integrity (DNSSEC/CAA). Correctly implemented, these improve inbox placement and help block fraud.
Why choose PRECISION for Email DNS Security?
We’ve run business email and DNS at scale for ~30 years. We do more than publish TXT records—we map all your senders, design alignment for each flow (marketing, CRM, app, ticketing), implement SPF/DKIM/DMARC/MTA-STS/TLS-RPT/DNSSEC/BIMI, remediate blocklists and forwarding issues, then monitor DMARC reports and inbox outcomes with clear SLAs.
Which clouds and mail platforms do you support?
All major platforms: Microsoft 365/Exchange Online, Google Workspace/Gmail, Zoho, legacy cPanel/IMAP, as well as ESPs and relays (SendGrid, Amazon SES, Mailgun, Mailchimp, HubSpot, Salesforce Marketing Cloud, etc.). We also support on-prem MTA/SMTP relays (Postfix, Exim, Exchange, Proofpoint, Mimecast, etc.).
We’re seeing spoofed emails “from us,” customers get phishing links. Can DNS help?
Yes. We deploy DMARC with strict alignment (p=reject/quarantine), require DKIM signing, and use SPF correctly to prevent spoofing at major providers (Gmail/Outlook/Yahoo). We also implement MTA-STS/TLS-RPT to harden TLS delivery and monitor DMARC aggregate (RUA) and forensic (RUF) reports to detect abuse and take down look-alike domains.
Legitimate emails go to spam or show “via sendgrid.net/amazonses.com”. How do we fix deliverability?
We align the visible From domain with your DKIM d= domain (DMARC alignment), ensure SPF ‘include’ chains are valid (<10 DNS lookups), configure custom return-paths (SPF/DMARC alignment for bounces), set up MTA-STS/TLS policies, and implement BIMI where appropriate. We also check PTR/HELO consistency, ARC for mailing list hops, and sender reputation (Microsoft SNDS/Google Postmaster).
Our SPF is too long and shows 'too many DNS lookups'. What now?
SPF allows max 10 DNS-mechanism lookups. We audit all include mechanisms, collapse and ‘flatten’ where safe, remove dead entries, use sub-domains per vendor, and adopt macros or designated SMTP relays to keep within limits without breaking deliverability.
Forwarding and mailing lists break SPF—how do we deal with that?
SPF fails after forwarding because the envelope sender changes. We rely on DKIM for alignment and enable DMARC aligned to the From domain. For complex relays and lists, we can implement ARC so downstream receivers trust the original authentication, and we tune DMARC policy (e.g., quarantine before reject) while monitoring impact.
We use multiple senders (CRM, billing, product, marketing). Can DMARC still be enforced?
Yes. We inventory all sending sources, assign each a proper DKIM selector and SPF include, and map them to a consistent ‘From’ domain or aligned sub-domains. We often roll out DMARC in phases (p=none → p=quarantine → p=reject) while validating each sender in DMARC aggregate reports to avoid breaking legitimate mail.
Will Email DNS Security reduce spam *we* receive?
SPF/DKIM/DMARC mainly prevent others spoofing your domain (outbound identity). To reduce inbound spam, we also tune your receiving MTA’s anti-spam stack (reputation checks, DNSBLs, SPF/DMARC/ARC validation, HELO/PTR checks, throttling and greylisting, quarantine policies) and implement user-level anti-phishing policies.
Do you offer a prepaid Email DNS Security hardening block?
Yes. A convenient starter is 6 hours for ₹9,900. It includes a quick audit (SPF/DKIM/DMARC/MTA-STS/TLS-RPT/DNSSEC/BIMI), a remediation plan, and implementation of the most impactful fixes (e.g., DKIM keys, SPF flattening, initial DMARC at p=none with RUA/RUF). You can stack blocks or move to a managed plan.
What ongoing services do you provide after initial setup?
Continuous DMARC report ingestion & analysis, alerting on spoof sources, DKIM key rotation, SPF change control, MTA-STS/TLS-RPT monitoring, blocklist watch & delist assistance, BIMI maintenance (VMC renewals), and change management when you add/remove third-party senders.
What access do you need to get started?
Read/Write to DNS (or we provide records for your team), mail platform admin (to publish DKIM keys & routing), and optionally access to DMARC report mailbox or API to ingest RUA/RUF XML. We work with IT/SecOps change control and can implement via pair-program or change windows.
Can you provide on-site Email DNS assistance?
Yes. We’re remote-first and can arrange on-site workshops, change windows, or incident response where required.
Our domain is already on a blocklist. Can you help us get delisted?
Yes. We diagnose the root cause (compromised credentials, open relay, misconfigured SPF/DKIM, content issues), fix the source, submit delist requests, and monitor recovery of reputation and inbox placement.
What’s the difference between SPF, DKIM and DMARC?
SPF lists which servers may send for your domain (by IP/hostname). DKIM adds a cryptographic signature proving the message wasn’t altered and ties it to a domain via a DNS public key. DMARC tells receivers how to treat failures (none/quarantine/reject) and requires alignment between the visible From domain and the authenticated domain.
What is MTA-STS and TLS-RPT, and do we need them?
MTA-STS lets you enforce TLS for inbound mail delivery to your domain, preventing ‘downgrade’ and MitM attacks. TLS-RPT sends daily reports if someone tries to deliver mail to you without proper TLS. We publish the required policy and configure the reporting endpoint.
What is DNSSEC and CAA in the context of email?
DNSSEC cryptographically signs your DNS zones so records (SPF/DKIM/DMARC/MTA-STS/BIMI) can’t be silently altered in transit. CAA restricts which Certificate Authorities can issue certificates for your domain, reducing risk of rogue cert issuance for your mail hosts.
What is BIMI and do we need a VMC?
BIMI can display your brand logo next to email in supporting inboxes (Gmail, Apple, Fastmail). It requires a validated SVG Tiny-PS logo, a BIMI DNS record, and most providers now require a Verified Mark Certificate (VMC). We handle the logo prep, VMC issuance and DNS steps, and ensure DMARC is at ‘quarantine’ or ‘reject’ as required.
What about ARC? Do we need it?
Authenticated Received Chain (ARC) preserves authentication results through intermediaries (e.g., mailing lists, forwarders). If your mail is frequently forwarded and DMARC fails at the destination, we can enable ARC on your outbound gateways to improve downstream acceptance.
How do you handle multi-brand or multi-domain organisations?
We map a policy hierarchy: parent domain with a strict DMARC ‘p’ and use ‘sp=’ for all sub-domains, isolate third-party senders on delegated sub-domains (e.g., mail.example.com), and apply per-brand DKIM selectors and SPF includes. Reports roll up by domain for central visibility.
Can you support internationalised or IDN domains (e.g., हिन्दी.भारत)?
Yes. We handle punycode (XN--) labels for DNS records, confirm TLD support for DNSSEC, and validate that mail providers and BIMI/VMC vendors accept the script. We also plan fallback/alias strategies if any provider lacks IDN support.
How long does it take to move from no policy to DMARC ‘reject’ safely?
Typical rollouts: Week 1–2 audit and ‘p=none’ with RUA/RUF. Weeks 3–6: fix SPF/DKIM/forwarders and onboard all senders; raise to ‘p=quarantine’. Weeks 6–10: monitor, close gaps, then move to ‘p=reject’. Timelines vary with the number of sending systems and vendor responsiveness.
Do we need dedicated IPs to improve deliverability?
Not always. Dedicated IPs help when you send high volumes and manage reputation well. For modest senders, reputable shared pools plus strong authentication and good sending practices (list hygiene, engagement, content) often outperform unmanaged dedicated IPs.
How do you monitor success after deployment?
We track DMARC RUA coverage and pass rates, top failing sources, SPF lookup counts, DKIM pass rates by selector, blocklist status, TLS-RPT failures, and inbox placement indicators (Google Postmaster, SNDS) to prove measurable improvements.
What if we must allow some third-party to keep using their own From domain?
We can configure sub-addressing or domain-based message authentication (e.g., configure that sender to use a sub-domain you control, or align DKIM with your domain). If that’s not possible, we’ll set DMARC policy exceptions and rely on ARC where feasible, while documenting residual risk.
How do you handle mergers, new brands, or decommissioning old domains?
We create a domain lifecycle plan: set strict DMARC for parked/legacy domains (p=reject), enable monitoring on all zones, and migrate active senders to approved sub-domains. We maintain a registry of authorised senders and retire unused ones to prevent shadow-IT mail.
Can you help with bulk spam outbreaks or account compromises?
Yes. We triage quickly: revoke/rotate credentials, enable/mandate MFA, cut off compromised senders, purge queued spam, submit delist/ remediation tickets, and issue customer advisories. Then we implement policy and process changes to prevent recurrence.
What’s the right DMARC policy (none, quarantine, reject) for us?
Start with p=none for visibility, fix alignment, then move to p=quarantine and finally p=reject once all legitimate sources pass DMARC. Highly targeted brands, finance, and gov/edu should reach p=reject; others may hold at p=quarantine while monitoring.
Do DMARC forensic (RUF) reports leak personal data?
RUF may contain message samples or headers. We only enable RUF with your approval and route them to secure storage; we redact PII, restrict access, and set retention policies aligned with your compliance requirements.
How often should DKIM keys be rotated and what key size is recommended?
Use 2048-bit RSA (or ECDSA where supported). Rotate keys every 6–12 months or after any incident. We manage dual-signing windows for seamless rollover and remove stale selectors from DNS.
Will enforcing TLS break deliverability?
MTA-STS enforces TLS only for inbound mail to your domain. We test your providers’ outbound STARTTLS to major receivers and add fallbacks where needed. For very old receivers that can’t do TLS, we can scope policies to avoid blocking legitimate traffic.
Do you provide a dashboard to view DMARC and TLS-RPT data?
Yes. We aggregate RUA/RUF and TLS-RPT reports, visualise pass/fail by source, show top sending IPs and geos, spot forwarder-related SPF breaks, and track progress toward p=reject. We can integrate with your SIEM for centralised alerting.
Can you integrate with our ticketing/ITSM for change control and incidents?
Yes. We integrate with ServiceNow/Jira/Freshdesk, automate change approvals for DNS edits, and push alerts into your chosen channels (email/Slack/Teams) with remediation playbooks attached.
What response times do you offer for incidents?
Business-hours response with emergency channels; faster SLAs are available on retainers. We operate in IST and can extend overlap for global teams.
Can you start an Email DNS audit this week?
Often yes. We can kick off remotely and schedule on-site sessions for workshops, cutovers and testing.
Our domain is being spoofed or mail is landing in spam. Can you help now?
Yes. We can engage immediately: lock down DNS, publish interim policies, stop abuse sources, fix authentication, and coordinate with mailbox providers—then deliver a clear hardening plan.

Need urgent help with a phishing/spoofing or deliverability issue?

Contact Sales for Email DNS Security