Conrad Niedzielski

I help cold emailers monitor deliverability and auto-replace burnt inboxes with

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[Conrad Niedzielski @ConradOutbound]

the cold email infrastructure market was designed around one premise

sell agencies visibility into problems you created
monitoring as an upsell
rotation as an upsell
health scores as an upsell
dashboards as an upsell

we built peeker because we think this model is wrong

infra that monitors itself
heals itself
orders its own replacements
and shows you everything in real time
isn't a premium tier
it's just what infrastructure should be

if you run cold email at scale, you deserve tools built for your actual problem
that's what we're building

retweet if you think the cold email infra market needs to change. let's find everyone who agrees.

#coldEmail #coldEmailInfrastructure #emailDeliverability #agencyOwner #outboundSales #agencyGrowth

[Conrad Niedzielski @ConradOutbound]

agency that switched to peeker 90 days ago

before:
→ 4hrs/week on inbox management
→ 2 client escalations in 60 days
→ deliverability checked manually every friday
→ 3 separate monitoring tools

after:
→ 0hrs/week on inbox management
→ 0 client escalations since onboarding
→ deliverability monitored 24/7 automatically
→ 1 dashboard for everything

they didn't get smarter
they stopped doing work their infrastructure should have been doing

like if you want your agency to look like the 'after' version

#agencyOwner #coldEmail #coldEmailInfrastructure #emailDeliverability #agencyGrowth

[Conrad Niedzielski @ConradOutbound]

agency owners: how many domains are you managing for clients right now

a) 1-10
b) 11-30
c) 31-60
d) 60+

and are you monitoring all of them in one place

drop your answer

retweet so we get a real sample here. building something for every level of this

#coldEmail #agencyOwner #emailDeliverability #coldEmailInfrastructure #outboundSales

[Conrad Niedzielski @ConradOutbound]

everything you need to know about domain reputation for cold email — no fluff 🧵

what domain reputation actually is: a score that email providers assign to your sending domain based on your sending behavior. it determines whether your emails land in inbox, promotions, or spam.

what affects it:
→ domain age (older = more trusted)
→ sending history (consistent = trusted, erratic = flagged)
→ spam complaint rate (above 0.1% = red zone)
→ bounce rate (above 3% = red zone)
→ blacklist appearances
→ authentication (spf/dkim/dmarc must all pass)

how to protect it:
→ monitor continuously, not monthly
→ separate domain per campaign segment
→ auto-rotate inboxes before reputation degrades
→ never send from your primary domain

save this. share with every agency owner still using their primary domain for cold sends.

#coldEmail #emailDeliverability #coldEmailTips #inboxPlacement #agencyOwner #outboundSales

[Conrad Niedzielski @ConradOutbound]

what good deliverability alerts look like

not: "your score dropped"

yes:
→ "domain https://t.co/9vQU0LyC6f appeared on spamhaus at 6:47am — affected inboxes paused from sends"
→ "mailbox [email protected] health score dropped to 42 — replacement queued"
→ "dkim misconfiguration detected on new domain — action required before first send"

the difference between a score and an alert is whether you know what to do next

like if your current tool gives you a score but not an action item

#emailDeliverability #coldEmail #coldEmailInfrastructure #agencyOwner #inboxPlacement

[Conrad Niedzielski @ConradOutbound]

the cold email infrastructure market was built around selling you visibility into problems it created

charge for monitoring
charge for rotation tools
charge for the dashboard
charge for support when campaigns break

the entire model depends on your infrastructure being just broken enough to need constant management

we built peeker on a different premise
infrastructure that monitors itself, heals itself, orders its own replacements, and shows you everything in real time is just better infrastructure

retweet if you think the infrastructure market needs to be rebuilt around agencies, not around upsells

#coldEmail #coldEmailInfrastructure #emailDeliverability #agencyOwner #outboundSales #agencyGrowth

[Conrad Niedzielski @ConradOutbound]

heard from an agency owner yesterday

"we saved our biggest client because peeker flagged a blacklist hit at 7am
campaign was scheduled for 9am
we fixed it before the send
client never knew anything happened"

that's the whole point
the best infrastructure stories are the ones that never become stories

like if you wish you'd had something like this running before your last deliverability crisis

#coldEmail #coldEmailInfrastructure #emailDeliverability #agencyOwner #clientRetention

[Conrad Niedzielski @ConradOutbound]

real talk

what's the one thing about running cold email at scale that nobody warned you about

for me it's how fast infra breaks when you add clients
one week you're running 5 accounts fine
next week you've got 12 and everything needs attention at once

drop yours below

reply with the thing nobody warned you about. this thread is going to be useful for everyone

#coldEmail #agencyOwner #emailDeliverability #agencyGrowth #outboundSales

[Conrad Niedzielski @ConradOutbound]

running cold email for 10 clients
50 sending domains
300+ active mailboxes

monitoring all of them manually is 15+ hours a week of infrastructure management

or
one dashboard
real-time alerts
auto-ordering
zero hours a week

the math isn't complicated

like if you've ever done the math on how many hours you spend managing infra

#coldEmail #coldEmailInfrastructure #agencyOwner #emailDeliverability #agencyGrowth

[Conrad Niedzielski @ConradOutbound]

most agencies check blacklists after a client complains
after reply rates drop
after the campaign has been burning for 2 weeks

peeker monitors 50+ blacklist registries continuously
and flags the moment any of your sending domains appear

you find out before your next send
not after

that's the difference between proactive and reactive infrastructure

like if your current tool tells you about blacklists after the fact

#emailDeliverability #coldEmail #coldEmailInfrastructure #agencyOwner #inboxPlacement

[Conrad Niedzielski @ConradOutbound]

why cold email infrastructure has to come before copy — thread 🧵

most people think:
step 1 → write good emails
step 2 → build clean lists
step 3 → set up sending tool
step 4 → profit

the real order:
step 1 → build infrastructure that actually delivers
step 2 → build clean lists
step 3 → write good emails
step 4 → profit

here's why the order matters:
the best copy in the world sitting in a spam folder generates zero replies
you can't a/b test your way out of a blacklisted domain
the sending layer is the foundation. everything else builds on it.

retweet if this is the order you wish someone had told you from day one

#coldEmail #coldEmailInfrastructure #emailDeliverability #agencyOwner #outboundSales #coldEmailTips

[Conrad Niedzielski @ConradOutbound]

two agencies
same copy
same list
same offer
same icp

agency a: manual infra, checking deliverability weekly, replacing inboxes when they remember
agency b: self-healing infra, real-time monitoring, auto-ordering, zero manual intervention

agency b closes more
not because they're smarter
because their emails actually land

like if you know which agency you've been running

#coldEmail #emailDeliverability #coldEmailInfrastructure #agencyOwner #inboxPlacement #outboundSales

[Conrad Niedzielski @ConradOutbound]

controversial take

the best agency cold email setups are boring
no manual tinkering
no late nights fixing broken inboxes
no heroics when a domain gets flagged
just infrastructure that runs itself

agencies obsessing over manual configuration are losing to the ones who automated it and moved on

boring infrastructure wins every time

agree or disagree?

reply with your counterargument — i genuinely want to hear it

#coldEmail #agencyOwner #coldEmailTips #outboundSales #agencyGrowth #emailDeliverability

[Conrad Niedzielski @ConradOutbound]

talked to an agency owner last week
8 clients
running everything manually
3 different monitoring tools
2 inbox replacement services

he said: "i spend more time managing the infrastructure than managing the clients"

that's not a business problem
that's an infrastructure problem

one stack. one dashboard. automatic recovery.
that's the job that should never exist.

like if this is you right now. it doesn't have to be.

#agencyOwner #coldEmail #coldEmailInfrastructure #emailDeliverability #agencyGrowth

[Conrad Niedzielski @ConradOutbound]

what you get with peeker that competitors charge separately for

✅ real-time deliverability dashboard — free
✅ blacklist monitoring (50+ registries) — free
✅ per-mailbox health scoring — free
✅ spf / dkim / dmarc validation — free
✅ auto-ordering on inbox degradation — included
✅ self-healing rotation logic — included
✅ multi-client account isolation — included

competitors charge $49-149/mo for each of these
we include them because infra that charges you to watch itself fail isn't infrastructure
it's a subscription trap

like if you're paying for at least one of these as a separate tool right now

#coldEmail #coldEmailTools #emailDeliverability #agencyOwner #coldEmailInfrastructure #SaaS

[Conrad Niedzielski @ConradOutbound]

how self-healing cold email infrastructure works — step by step, no fluff 🧵

step 1: continuous health scoring — every mailbox scored in real time. bounce rate, spam flags, reply rate, blacklist status. always on.

step 2: threshold detection — score drops below your configured threshold → mailbox pulled from rotation automatically. no human decision required.

step 3: auto-ordering triggers — if the degraded inbox can't recover in a set window → replacement auto-ordered. no ticket. no manual action.

step 4: background warmup — replacement starts warming while healthy inboxes carry the send volume. campaign never pauses.

step 5: automatic reintegration — new inbox passes warmup → back in rotation automatically. cycle complete.

time you spent on this: 0 minutes.

retweet if this is how every cold email agency should be running their stack

#coldEmail #coldEmailInfrastructure #emailDeliverability #agencyOwner #outboundSales #coldEmailTips

[Conrad Niedzielski @ConradOutbound]

what's the biggest cold email infrastructure problem at your agency rn

a) no real-time visibility across clients
b) manually replacing burned inboxes
c) deliverability drops with no warning
d) paying too much for tools that don't talk to each other

drop your letter. building for exactly this.

retweet so more agency owners see this. curious if b is as common as i think

#coldEmail #agencyOwner #emailDeliverability #outboundSales #coldEmailInfrastructure

[Conrad Niedzielski @ConradOutbound]

agency came to us managing cold email for 14 clients

situation:
→ no unified deliverability view across accounts
→ 3 burned domains in 60 days
→ one client threatening to churn

30 days on peeker:
→ all 14 accounts visible in one real-time dashboard
→ auto-ordering replaced 2 degraded inboxes — they didn't touch a settings page
→ inbox placement up across the board
→ at-risk client renewed

infrastructure isn't exciting until it saves a $6k/mo client relationship

like this if you've saved a client relationship because you caught a problem early

#agencyOwner #coldEmail #clientRetention #emailDeliverability #coldEmailInfrastructure #agencyGrowth

[Conrad Niedzielski @ConradOutbound]

imagine running cold email for 15 clients
and finding out campaign 7 has had a blacklisted domain for 11 days

not from your dashboard
not from an alert
from the client asking why no one has replied this week

this is the standard in agency cold email right now
you should always know before they do

like if this has happened to you. let's make the industry actually talk about it

#coldEmail #agencyOwner #emailDeliverability #coldEmailInfrastructure #clientRetention

[Conrad Niedzielski @ConradOutbound]

running cold email for multiple clients from one place

→ each client's domains isolated from each other
→ deliverability tracked per account, not averaged across your stack
→ alerts by client, not one noisy feed
→ auto-ordering queued per account independently
→ one dashboard. all clients. real time.

this is what agency-grade infrastructure looks like
not 12 browser tabs and a spreadsheet

like this if you're managing multi-client cold email without a unified view right now

#agencyOwner #coldEmail #coldEmailInfrastructure #emailDeliverability #agencyGrowth