What is AirMail?
AirMail is Instantly's native email sending infrastructure for cold outreach. AirMail inboxes are high-quality inboxes built on private, dedicated Instantly's servers with isolated domain pools and owned, aged IPs, optimized specifically for B2B and outreach at scale.
AirMail is complementary to Google Workspace or Outlook mailboxes, not a replacement. It's the dedicated-IP layer that picks up where managed mailboxes reach their ceiling. The strongest setup is hybrid:
Google / Outlook: Every day sending volume and standard accounts
Airmail: High-volume cohorts, sensitive accounts, and sending patterns that require full IP control
What Makes AirMail Different
Native integration
AirMail mailboxes appear inside your Instantly dashboard the moment they are provisioned.
AirMail is not connected to Instantly. It is part of Instantly.
No API keys. No sequencer connection step. No third-party sync.
You provision inboxes, run campaigns, and see reporting all from the same dashboard.
Premium warmup pool by default
Every AirMail inbox is auto-enrolled in Instantly's premium warmup pool.
The premium warmup pool is the largest network in cold email, already trusted across millions of sends.
AirMail users get the best warmup in the industry without configuring anything or an extra invoice.
Smart pattern-based pod isolation
Customers are grouped into smaller pods based on sending pattern, volume, and domain behavior.
AirMail's neighbors send as you do. Bad behavior from a stranger never reaches your domains.
Smaller, behavior-aware pods mean reputation moves with the cohort, not against it.
Your IP reputation stays clean because your pod is curated by behavior, not just size.
0 SPF fails
SPF fails are the most preventable deliverability problem in cold email and the most common reason that a clean infrastructure provider quietly underperforms.
AirMail's production fleet runs at 0 SPF authentication failures.
Automated SPF, DKIM, and DMARC setup at every domain connection.
Authentication validated before the first send.
Clean authentication on every message, every send, every domain.
One bill, one team
Bundled Instantly subscription and unified support team.
One Instantly team has full context on the sequencer, the campaigns, and the infrastructure history.
When deliverability shifts, you are not triaging across two queues.
How to Get AirMail Mailboxes
Step 1: Access DFY Setup
Go to Email Accounts dashboard
Click "Add New" button
Select "Done-for-You Email Setup" -> "AirMail By Instantly" Option
Step 2: Enter Your Primary Domain
Your main business domain (e.g., yourbusiness.com)
Used to generate related secondary domains
Secondary domains will be similar but distinct
We currently only support .com, and .org TLDs as these provide optimal email performance. Other TLDs such as .io or .ai are not supported at this time.
Step 3: Select Secondary Domains
After entering the domain, our system suggests secondary domains based on your primary domain:
Review suggested options
Select domains you want to purchase
You can select as many or as few as you like and click Next
If you don't like the initial suggestions, click Search More for additional options.
Step 4: Set Forwarding Domain (Optional)
Redirects visitors from secondary domains to your main website. If your leads visit secondary domains, they'll be redirected to your main domain.
Enter your main domain in the "Forwarding Domain" field
Example: yourbusiness.com
The secondary domains will be redirected to your main website
Step 5: Customize Email Addresses
Our system automatically generates 5 email addresses per domain based on your Instantly account name. If you don't like the generated usernames:
Click the "Trash" icon in the Action column to delete
Type a new username before the @ All domains part
Click "Add" to generate a new email address
Step 6: Select Number of Inboxes
Inbox limits: Maximum 5 email accounts per domain
At the bottom of the page, you can see your monthly and annual prices based on the number of domains and inboxes you've selected.
$15 per domain per year
$4 per email address per month
Step 7: Place Your Order
Verify domains chosen
Confirm email addresses
Check total inbox count
Review pricing
Click "Place Order" and follow the payment process to complete your order.
FAQs
Does AirMail replace my Google or Outlook inboxes?
No, it's complementary. Google and Outlook remain fully supported and are great for everyday sending. AirMail is for customers who need dedicated IPs, higher volume headroom, or full infrastructure control. The best setup uses both.
What's the difference between AirMail and Google DFY?
Google DFY inboxes are managed mailboxes: Sending behavior is governed by Google's algorithm, which means daily caps, suspension risk, and no dedicated IP.
AirMail is a private SMTP product: The entire backend is controlled by Instantly, giving customers full control over their sending infrastructure with no dependency on Google's rules.
I'm already using AeroSend/ Maildoso. Why would I switch?
AirMail is built directly into Instantly - no separate tool, no API keys, no second support queue. You also get Instantly's premium warmup pool included by default, and smarter pod isolation that groups you by how you actually send, not just domain count.
What's pod isolation and why does it matter?
Your inboxes are grouped with senders who have a similar sending pattern and volume. A bad actor spam-blasting dirty lists never ends up as your neighbor. Your IP reputation stays clean because your pod is curated by behavior, not just size.
Why is availability limited to 5,000 accounts per week?
This is a deliberate decision to protect quality at launch. By controlling how many inboxes go live each week, we ensure every AirMail inbox performs at the level we've promised. It's not a supply issue, it's an infrastructure quality decision. Availability resets weekly on a first-come, first-served basis.
What's the best practice for setting this up?
Recommended: Diversify across infrastructure types for best results. A good starting split is 50% AirMail inboxes and 50% Google inboxes.
This gives you the reliability and trust signals of managed mailboxes alongside the volume headroom and dedicated IP control of Air Mail. Spreading sends across two infrastructure types means that if one experiences throttling or a deliverability dip, the other keeps your campaigns running. It also signals natural, diverse sending behavior to inbox providers, which helps placement long-term.
What is SMTP / why is this different from Gmail?
Gmail and Outlook are managed mailboxes with daily caps, suspension risk, and no dedicated IP. AirMail inboxes run on Instantly's own servers and IPs, they look and behave like normal email addresses but are fully optimized for outbound volume.
Is AirMail an email service provider?
No, AirMail is not an email service provider. It is a private email sending infrastructure built into Instantly. We host the servers and IPs, and you use the mailboxes through your Instantly dashboard. There is no AirMail login page, no standalone AirMail inbox UI for you to interact with outside of Instantly.