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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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