More replies from Instantly

If you run Instantly, this is for you. sending.ac mailboxes connect to Instantly natively, qualify for the premium warm-up pool on their reputation, and get their warm-up checked against where your campaigns actually send.

See pricing Talk to an advisor

Research that helped Instantly improve its warm-up pool in 2024
213K mailboxes under management

Instantly + sending.ac

Mailboxesget-outreach.co, outreach-hq.co

Connected

Premium warm-up poolAdmitted on mailbox reputation

Admitted

Warm-up provider mixCompared with your campaign sends

Checked

Campaigns and sequencesWritten and sent from Instantly

In Instantly

Warm-up only pays off where your campaigns land

Reputation built on the wrong provider

Send 80% of a campaign to Google while 12% of your warm-up goes there, and three weeks of reputation went somewhere your campaign never lands.

A new mailbox has no reputation yet

Fresh mailboxes start with nothing to show a warm-up pool. Roughly three weeks pass before a domain earns its keep.

The reason sits below the campaign

Instantly shows you the reply rate moving. The causes behind a drop, from DNS to blocklists to placement, sit on the mailbox side.

One new domain, two different launches

An example month

Warm-up left to chance

Week 1
Warm-up starts. Most of it goes to Microsoft.
Week 2
Reputation builds where few of your leads are.
Week 3
The campaign launches to Google leads and replies come in thin.
Week 4
Back to warm-up, three weeks behind.

Week 1
The warm-up provider mix is compared with your lead list. The Google gap shows.
Week 1
You fix the warm-up mix before launch.
Week 2
Mailboxes keep warming in the premium pool, admitted on reputation.
Week 3
The campaign launches where your reputation is.

What sending.ac adds under Instantly

Your campaigns, sequences and rotation stay in Instantly. sending.ac works on the mailboxes they send from.

Warm-up compared with where you send

sending.ac compares the provider mix of your warm-up pool with the provider mix of your campaigns, measured from outside the pool. It is free and works on mailboxes you bought elsewhere too.

Pool composition against your lead list
Measured from outside the pool
Free on any infrastructure

Warm-up provider mix

Your Instantly campaigns send to

Google80%

Microsoft16%

Other4%

Your warm-up pool sends to

Google12%

Microsoft71%

Other17%

Mismatch on Google. Most of your leads are there; little of your warm-up is.

Mailboxes that qualify for the premium pool

The premium warm-up pool admits mailboxes on reputation, and sending.ac mailboxes qualify. Each one sits on an isolated tenant with DNS verified before its first send. Pre-warmed is a toggle on any plan when you need to start sooner.

Pre-warmed toggle on any plan
Automatic reconnects keep mailboxes in rotation
Placement measured hourly

Under one Instantly mailbox

Isolated tenantOwn IPs, own reputation

DNS, verifiedSPF, DKIM and DMARC before the first send

Premium warm-up poolAdmitted on reputation

Connected to InstantlyReady for your sequences

One account under every sequencer you run

If your team or your clients run more than Instantly, every sequencer sits on the same account, with the same checks on every domain.

Native connections to all four
Mailboxes bought elsewhere connect for free
7 checks per domain, every day

Your account · sequencers

SmartleadNative

InstantlyNative

PlusVibeNative

EmailBisonNative

Teams running outbound on sending.ac

213Kmailboxes under management

7checks per domain, every day

30 daysto replace a burned mailbox

75mailboxes on a single domain

Sergio PereaInbox buyer

Message

Btw, you guys have the smoothest UX/UI of all the inbox resellers I’ve purchased from. And I’ve worked with ALL of them.

From one order to sending in Instantly

Order domains and mailboxes
Any TLD, and up to 75 mailboxes per domain on Azure.
DNS, set up for you
SPF, DKIM and DMARC are written and verified per domain before the first send. The first domain set can be live the day you sign up.
Connect to Instantly
The mailboxes connect natively and arrive ready for your sequences. Warm-up takes its usual few weeks, checked from outside the tool doing the warming.

Questions Instantly users ask

Most of these are faster on a 15-minute call with someone who already knows the answer.

Talk to an advisor

Do my campaigns move out of Instantly?

No. Campaigns, sequences and rotation stay in Instantly. sending.ac works on the mailboxes underneath them.

Can I connect mailboxes I already have?

Yes. Mailboxes bought anywhere else connect for free. You only pay for what you provision through sending.ac.

What happens when Microsoft asks for a reconnect?

sending.ac reconnects the mailbox automatically, and it stays in your Instantly rotation.

What happens when a mailbox burns?

Risk Level flags it from sending data before the reply rate shows it. Mailbox insurance replaces it within 30 days at no extra cost, even if it was bought elsewhere. Insurance is free and in early access.

How fast can I start sending?

Domains, DNS and mailboxes are set up automatically, so the first domain set can be live the day you sign up. Warm-up still takes its usual few weeks.

Do my mailboxes get the premium warm-up pool?

The premium warm-up pool admits mailboxes on reputation, and sending.ac mailboxes qualify.

Running Instantly? Start with the mailboxes.

Order mailboxes, domains and DNS in one go and connect them to Instantly. The first domain set can be live the day you sign up.