Authenticate, or bounce
Send 5,000+ a day and you must pass SPF, DKIM and DMARC, offer one-click unsubscribe, and keep spam complaints under 0.3% — or your mail is rejected outright.
Google sender guidelinesReach the inbox.
From the inbox to the front page — high-volume email deliverability and the full growth stack: SEO, paid media, social and content. Run by people who send and rank every single day.
Engineered for every major inbox
- Gmail
- Outlook
- Yahoo
- Apple Mail
- Proton
- Zoho
Why it’s hard now The rules changed.
The rules changed.
Most senders haven’t caught up.
In 2024–2025, Gmail, Yahoo and Microsoft turned “best practices” into hard requirements. Miss them and your mail gets throttled, junked, or rejected — no warning, no appeal.
Junked, then blocked
High-volume senders failing authentication are routed to Junk, then hard-rejected with “550 5.7.515”. Outlook.com, Hotmail and Live are all in scope.
Microsoft sender requirementsReputation is fragile
One bad week — a volume spike, a stale list, a broken record — can sink a domain’s reputation for months. Recovery is slow and manual. Prevention is cheap.
What we do
Four levers decide whether you land in the inbox.
Deliverability isn’t one switch — it’s a system. We own all four parts of it, end to end, so nothing quietly drifts out of spec.
Authentication
SPF, DKIM, DMARC and BIMI configured and aligned, so mailbox providers know your mail is really yours — the foundation everything else sits on.
- ✓ SPF aligned
- ✓ DKIM signed
- ✓ DMARC enforced
- ✓ BIMI ready
Monitoring & inbox placement
Seed testing, blacklist watching and placement tracking across Gmail, Outlook and Yahoo — problems surface on our dashboard, not in your open rates.
Seed testsBlacklistsPlacement
Reputation & warmup
Gradual IP and domain warmup, plus ongoing reputation management — scale volume without torching your sender history.
IP warmupDomain reputation
List hygiene & engagement
Bounce suppression, sunsetting dead addresses, and engagement strategy that keeps complaints under the 0.3% line providers now enforce.
Suppression< 0.3% complaints
What we do
Email is our edge. Growth is the goal.
Deliverability is where we obsess — and we run the whole growth stack with the same exacting standard. Six disciplines, one team.
6 channels, one team email · SEO · paid · social · content · analytics
1 team that owns it no hand-offs, no junior bait-and-switch
99%+ inbox placement the bar we engineer every send to
0 vanity metrics we report what changes decisions
Precision monitoring Protect your sender reputation
Protect your sender reputation
with exacting precision.
We watch every signal that decides the inbox. Hover the charts — these are the numbers we track for every sending program, live.
Inbox placement last 8 weeks · hover
94% delivered to the inbox
Spam, caught early
Placement split — hover a segment.
94%inbox
Inbox 94% Spam 6%
Reputation, precisely
The health checks we run continuously.
- Sender reputation 98 / 100
- Complaint rate 0.04%
- Bounce rate 0.8%
SPF ✓ DKIM ✓ DMARC ✓
Illustrative — representative of the signals we monitor for every sending program.
Why Spunkads
We don’t advise from the sidelines. We send.
Most deliverability help is theoretical — a slide deck and a checklist. Spunkads runs high-volume email in production every day. The playbook we’d put behind your program is the same one we trust with our own reputation. No agency theater, no hand-off to junior staff. Just the inbox.
- Operators first We live in the data — bounce logs, seed tests, postmaster tools. If it doesn’t move placement, we don’t do it.
- Plain answers A straight read on what’s broken and what it takes to fix it — not a retainer engineered to last forever.
- Measured by the inbox Success is your mail in the inbox. That’s the only number we optimize for.
How we think
Principles, not buzzwords.
Inbox first
If it doesn’t land, nothing else matters. Deliverability is the foundation every other channel sits on.
Operators, not theorists
We run high-volume sending and live campaigns ourselves. The playbook is battle-tested, not borrowed off a slide.
Measured by results
Placement, rankings, replies, ROI. We optimize the numbers that actually move your business.
Zero vanity metrics
No fluff dashboards. If a metric doesn’t change a decision, we don’t put it in front of you.
Leadership
We got obsessed with one number — how much email actually lands in the inbox. Spunkads is that obsession, turned into a service.
Bhupinder Singh Founder & CEO, Spunkads
The standard
The bar we engineer to.
These aren’t client results — we’re early, and we don’t invent numbers. They’re the targets every sending program we touch is built to hold.
< 0.3% Spam complaint rate the line Gmail & Yahoo now enforce
< 2% Bounce rate clean lists, suppressed and current
100% Authentication SPF · DKIM · DMARC aligned, BIMI-ready
24/7 Monitoring placement & reputation, continuously
How we work
From “why is this in spam?” to dependable inbox.
A straight path, not an open-ended retainer. Here’s what working with us looks like.
- 01
Audit
We map your domains, authentication, infrastructure and current placement. You get a clear picture of exactly what’s broken — and why.
- 02
Authenticate & fix
SPF, DKIM and DMARC aligned, infrastructure cleaned up, suppression and one-click unsubscribe brought fully to spec.
- 03
Warm & scale
A controlled ramp that builds reputation instead of breaking it — typically 2–6 weeks, paced to your real volume.
- 04
Monitor
Ongoing placement, reputation and blacklist monitoring, so you stay in the inbox as you grow — not just on launch day.
On the roadmap
Coming soon: sending infrastructure, done right.
We’re building the sending infrastructure we always wished we had — authenticated, warmed and monitored from day one, so you can scale volume without scaling risk. Want first access?
Talk to us about early access FAQ
Straight answers.
The questions high-volume senders ask us most.
Why does legitimate email still land in spam?
Usually it’s authentication or reputation — not your content. A missing or misaligned SPF, DKIM or DMARC record, a cold IP, or a stale list will send perfectly good mail to the spam folder. We diagnose which one is hurting you, then fix it.
Dedicated IP or shared IP — which do I need?
It depends on volume and consistency. High, steady volume usually benefits from a dedicated IP you fully control; lower or spiky volume often does better in a well-managed shared pool. We give you a straight recommendation for your situation, not a default.
How long does warmup take?
Typically 2–6 weeks, depending on your target volume and how engaged your audience is. Rushing it is the fastest way to burn a new domain or IP, so we pace the ramp deliberately.
Do the new Gmail, Yahoo and Microsoft rules apply to me?
If you send roughly 5,000+ messages a day to any one provider, yes — directly. And even below that, the same signals (authentication, complaint rate, list quality) decide whether you reach the inbox. Getting them right is no longer optional.
Do you work with our existing ESP or sending stack?
Yes. SendGrid, Mailgun, Amazon SES, Postmark, your own MTA — the principles travel. We work with what you already have rather than forcing a migration.