
#1 Provider of Official Google Inboxes for cold email outreach. More Inboxes - More Contacts - More $$$$
Joined May 2024
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A reminder to read the replies before you report the rate.
For one of our customers, a campaign showed a 3% reply rate.
We read all 25 replies by hand, and not one was interested.
20 were out-of-office auto-replies.
The other 5 were 4 do-not-contact requests and a single no.
Positive reply rate is king.
Whether you order 1 inbox or 6,000, and they’ll reach your sequencer in about 4 hours. 1 hour if you are part of PX3
That's our average delivery time.
>> Our engineers build every account
>> They configure the records inside that window.
>> Each inbox passes a live placement test before delivery
The outer limit…
6 hours from the moment you press purchase.
Price is rarely why a team switches inbox providers.
Support is the #1 reason teams move their sending to us.
So we're putting the question to the market.
What would make you switch inbox providers?
A low warm-up health score is a weak reason to hold a campaign back.
If an account's score dips one week and recovers the next with no fix, the dip meant nothing.
That account could have been sending the whole time.
We flag an account when its reply rate drops below its own first-week baseline.
Judge an account on its replies.
Hand your mailboxes to a team that watches them for you → spend the quarter signing clients.
One agency running around 400 mailboxes across 8+ clients signed 5 new clients in Q2 on our infrastructure.
Before, they split those mailboxes across a few different providers.
When something went wrong, they had hardly any visibility into where.
At @premiuminboxes, all of it now belongs with us:
• Google and Microsoft inboxes under a SINGLE platform.
• A private Slack channel for their quick questions.
• White glove management, with our team watching over the infrastructure for them.
Since moving to us, their reply rates have held consistent.
All 5 new clients came from outreach sent on that same infrastructure.
The warm-up we recommend for every Microsoft inbox runs 3 to 4 weeks.
Google inboxes are ready to send inside 2.
Microsoft builds trust scores more slowly, so the ramp starts around 5 emails a day and builds to 12-15.
Plan the Microsoft side of every campaign around those extra weeks.
New customers ask us how fast a positive reply needs an answer.
The target we give them:
60 seconds.
If 10 minutes is your fastest today, start there and work down to a minute.
How fast does your team answer a positive reply?
The #1 cause for a disconnected mailbox is an unpaid invoice with the inbox provider.
Your accounts connect to the sequencer through an OAuth connection, an authorized application inside Google.
A disconnect means something else went wrong.
Once that invoice goes unpaid, the provider removes the accounts and the connection goes with them.
SMTP issues come second, then OAuth token refresh.
TL;DR:
Check the billing before you check the settings.
When you have a partner that owns deliverability for you, every dip gets caught before it costs you. One agency runs $4.5M a month in new client revenue through our infrastructure.
At that scale, a slight dip can cost them $100,000 without anyone noticing.
So we flag the drop as soon as it starts.
Our devs built them an ENTIRE flow that swaps bad inboxes for new ones.
Warmup and signature config are automated too.
Need a cold email setup that lands you clients?
With @premiuminboxes, it takes 3 steps:
(everything technical after that is ours)
• Buy your domains.
• Buy your inboxes.
• Submit the onboarding form.
(~10 minutes)
From there, we configure the accounts and upload them into your sequencer.
They go into your warm-up pool with the settings preset to best practice, so nobody on your side has to touch them for the first two weeks.
If you want your current setup checked before you buy, the cold email audit at @premiuminboxes is free and includes a live placement test.
Everything starts on the Premium Inboxes website, link in bio!
A green authentication tick on your cold email inboxes can STILL hide one misaligned record.
That single record sits underneath and kills your deliverability in week two…
…long after you've stopped looking.
Every inbox we send out at @Premiuminboxes has its:
- SPF
- DKIM
- DMARC
… all checked by hand by an engineer first.
This is the part you can't automate away.
9 times out of 10, bad copy is NOT the reason for a failing cold email campaign.
It's almost always this:
You're sitting in spam.
That’s why before we recommend anything to our customers at @Premiuminboxes…
…we run a free audit and a live placement test.
(yes, for EVERY single customer)
That way, you see exactly where your mail is landing first.
Cold email tip:
Apollo lists come back 50-65% valid.
We put EVERY list through a second check before it goes into a campaign.
A normal result is about 75% clean.
The addresses that fail never get sent.
Trust us:
Splitting attention across 3 channels before one of them works will make you mediocre at all 3.
A second channel is EARNED once one channel predictable.
Start with outbound, expand from there.
Warmup advice online runs anywhere from 3 to 6 weeks.
We tell every new customer a different number:
2 weeks.
Over 360,000+ inboxes in circulation back that answer.
Don’t overthink it.
Open rate is the most misleading number in cold email.
You're counting packet inspections, and paying for them in lost placement.
Click tracking is the same trade.
Turn both off.
Read the reply rates instead, and count the ones that came back from a human.
One domain can now do the work of fifty.
Yet, so many teams buy dozens of domains to run cold email at volume.
All you need:
1. 1 domain (the root)
2. Roughly 60 inboxes spread across the single root.
When an inbox burns, almost everyone buys new domains and warms up from scratch.
There is a faster reset, and it doesn’t require a new domain..
One domain and its inboxes sit on a single Google admin panel, where Google assigns the sending IP.
At @PremiumInboxes, we delete the accounts and rebuild them on a fresh panel.
That rotates the IP and changes the fingerprint, so the reputation regenerates.
The rebuild essentially skips over the full warm-up.
So, your rebuilt inbox is back to full sending in 2 to 3 days.
Our advice:
Rebuild the setup before you spend on new domains.
Cold email infrastructure gets bought like a commodity, and the cheapest inbox wins. But, comparing inboxes to the cent misses the point.
When the setup can't carry the volume, the copy and the list will never actually reach your prospect.
So at @premiuminboxes, we don't race to the bottom with price.
We’re a more expensive option, on purpose.
> Official Google and Microsoft accounts only
> Never resold, every account owned by you.
> Support is a technical account manager who reads your data and answers you directly.
Buy infrastructure for reliability first, always.
Or you’ll pay the price eventually.
Sending inboxes degrade on a curve.
When left alone, reply rates fall off and eventually stop landing in the primary.
Teams that stay consistent plan the replacement on a set cadence.
We want the market's read on this.
When do you replace your sending inboxes?
Options:
a) After a crash
b) On a fixed cadence
c) I run them until they die
d) Not sure



