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The fastest way to set up domains and inboxes for cold email
Manually setting up domains and inboxes is slow, confusing, and expensive.
Mailscale automates it and provides private email infrastructure—so you can start sending in minutes, without deliverability issues.









Setting up and managing cold email infrastructure is a hassle
You’re in business to generate revenue, not to configure DNS records and fix deliverability issues.
Most businesses fail at cold email—not because their offer is bad, but because their infrastructure isn't properly managed.

1. Tedious and time-consuming
Setting up inboxes manually takes time, and one wrong SPF, DKIM, or DMARC setting can kill deliverability.

2. Emails land in spam, and you don’t know why
Most teams have no visibility into deliverability—emails land in spam due to poor warm-up, sending limits, or provider flags, without warning.

3. High inbox costs are slowing down growth
Cold email gets expensive fast—either you limit your reach or overspend on Google and Outlook inboxes.

Instantly set up deliverability-optimized cold email infrastructure
Mailscale makes setting up domains and inboxes, and maintaining deliverability easy—so you can start sending in minutes, scale without limits, and never worry about issues again.
Easily set up domains & inboxes and push them to your sending tool
Mailscale lets you buy domains and generate inboxes at scale in minutes, with all DNS settings correctly configured. No wasted time, no setup mistakes—just send.
Increase reply rates with pre-warmed, high-deliverability IPs
You get access to our fully owned email infrastructure that we maintain with health protocols and blacklist management.
Our IPs are warmed up for years and have strong reputation, but we also offer dedicated IPs for advanced cold emailers who want full control.
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Prevent deliverability issues before they affect your performance
We watch over your domain health 24/7 and provide actionable improvement tips if anything drops—so you can prevent deliverability issues before they start.
If a domain gets a bad reputation, you can request for us to recover it within 7 days.
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Bulk import your inboxes into any sending tool
Get a CSV with login credentials of your inboxes to import into any email sending tool—often with a single click.
No more manual setup, just seamless integration.
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1,000+ Agencies with a competitive advantage
Mailscale helped more than 1000 B2B companies (agencies, software, consultants, etc.) to get more clients.
Here's what they say:

Effortlessly generate email inboxes
Buy secondary domains inside of Mailscale, fill out a 5-minute form, and instantly get login credentials of ready-to-use email inboxes.

95-100% Deliverability - Or Your Money Back
Mailscale handles deliverability for you - so you can focus on closing deals.
We guarantee 95-100% deliverability when sending to professional inboxes (Google/Outlook).
If your deliverability drops, even as a result of you not following best practices, or prospects marking your emails as spam, we'll help you recover your domains within 7 days.
If we ever fail, you get your money back or we buy new domains for you.


Pricing
Monthly
Yearly
(Save 20%)
If you're looking to book 2-5 sales calls a month.
You can contact ~2,000 prospects a month with this plan.
$4.20 per inbox/month (41% cheaper than Google/Outlook)
You can create up to 5 inboxes per domain.
So for this plan, you need a minimum of 3 domains.
Domains start at $9/year and you own them in case you want to discontinue Mailscale.
So you can plug them into any email sending tool (Mailshake, Lemlist, Woodpecker, Reply, Outreach, Apollo, etc.)
We do recommend Instantly or Smartlead. They have the best deliverability and allow you to add unlimited inboxes.
If at any point your deliverability suffers or domains get blacklisted, we unlist them for you in 7 days - If we ever fail, we will personally pay for your new domains.
If you're looking to book 10-20 sales calls a month.
You can contact ~10,000 prospects a month with this plan.
$1.90 per inbox/month (67% cheaper than Google/Outlook)
You can create up to 5 inboxes per domain.
So for this plan, you need a minimum of 10 domains.
Domains start at $9/year and you own them in case you want to discontinue Mailscale.
If you're looking to book 30-100+ sales calls a month.
You can contact ~30,000 prospects a month with this plan.
$0.99 per inbox/month (86% cheaper than Google/Outlook)
You can create up to 5 inboxes per domain.
So for this plan, you need a minimum of 40 domains.
Domains start at $9/year and you own them in case you want to discontinue Mailscale.
Frequently asked questions
Mailscale is a tool that automates the creation of company email accounts for cold outreach.
Here are your benefits:
- Generate 50+ inboxes in 5 minutes (instead of 6+ hours with Google or Outlook)
- Save 80% of costs with inboxes as low as $1/month instead of $7.20
- Get the best deliverability (we manage it for you and guarantee it)
- Never get blocked again (Google & Outlook don't allow you to cold email)
As a result, you can send more emails that land in the inbox and get more leads.
To not land in the spam, an email account should send no more than 20-30 emails per day.
Therefore, the only way to scale your outreach is by having lots of email accounts.
Example:
If you have 50 email accounts, you can target 5000-10,000 businesses a month (with a sequence of a few emails).
This is how you can get 50-100+ businesses interested in your offer.
Usually, businesses do email outreach in order to book sales calls.
By scaling your outreach with 50 or 200+ email accounts, our customers consistently book 30+ sales appointments and get 5+ clients.
Equally, a freelancer/SAAS with lower ticket offers can use email outreach to get hundreds of signups/customers.
Cold outreach will work for you if you're targeting businesses.
Therefore, any solopreneur, freelancer, agency owner or software founder can benefit from reaching out to their dream customers.
Inside of Mailscale's business plan, you'll get a full cold email course including tutorials on how you can get 10,000+ emails in any niche.
Mailscale provides you with email accounts. Think of them as your soldiers.
But you still need other tools such as an email sending tool like Instantly/Smartlead to send the emails.
Also, you need to get emails of your dream customers with tools such as Apollo.
In order to help you, we provide you with a full cold email course including how to get 10,000+ emails, set up the emails, write high converting emails etc.
All of these providers are for 'transactional emails' only.
Meaning, if you have an email list of subscribers that expect your email.
Cold outreach is against their policies and will get you banned.
The core mission of Mailscale is for you to be seen.
With our dedicated email infrastructure, our customers enjoy 95-100% deliverability scores across major providers.
In fact, if you don't see this in your first 14 days, you can get a refund if you'd like to cancel.
When starting your campaigns, with this kind of deliverability, you can get 40-70% open rates on campaigns.
This is 2-3-times higher than the average international email open rate which is 21%.
The end result is the same: Company email accounts.
But when using Google/Outlook, it would take you 12+ hours of technical setup (DKIM/DMARC/SPF etc.) to set them up and optimize for deliverability.
Also, it would cost you $400+/Month for 50 email accounts.
With Mailscale, all it takes is 5 minutes to fill out a form and you save 3-5x the costs.
In order to create email accounts, you need to buy additional domains (also if you don't use Mailscale)
That's because you can't set up 50 same emails on a single domain, you need to spread your volume.
Currently, we only offer for you to buy them inside of Mailscale since we add all the DNS records for you automatically.
You can create up to 5 emails per domain and the costs are $10-$15/year per domain.
When setting up 50 email accounts, this will effectively only add $7-$10 a month and these are your domains in case you want to cancel Mailscale in the future.
Currently not. As of now, our customers see Mailscale as a way of scaling outreach further if they already have emails and buy domains inside until they can transfer their old ones.
Yes, of course.
You can upgrade anytime no matter if you're on the monthly or yearly plan.
It's a simple process that takes you 3-5 minutes only:
1. Pick your plan
2. Purchase domains inside of Mailscale
3. Fill out a form with your desired email usernames
4. You get a CSV file with all email accounts that you can import with a single click into your email sending tool.
As with all providers, we recommend a warmup period of 1-2 weeks before starting to send campaigns.
Using a self-hosted email infrastructure is nothing new.
Large companies with thousands of employees such as TikTok don't use Google or Outlook (Also for security reasons).
They have their own infrastructure and of course, their emails land in the inbox when contacting businesses or sending emails between each other.
The only thing that's new here is that Mailscale finally makes this accessible to small business owners like yourself.
We're currently the only provider that owns the full infrastructure including SMTP servers, IP pools and more (While some others just resell accounts)
As a result, we can provide you with the best deliverability by being able to replace IPs in an instance for example.
Our infrastructure is optimized for cold email outreach and we have a full automated monitoring system that scans for blacklisting, reputation, spam reports, bounces and more so you don't have to deal with any of that.
While there's technically no limitation, you can negatively impact your reputation if you send too many emails (As with every provider).
We recommend to send a maximum of 30-50 emails per email account per day.
You can integrate the email inboxes you create with Mailscale with virtually every cold email sending tool.
That's because every cold outreach tool usually allows you to add self-hosted email accounts (IMAP/SMTP).
Mailscale provides you with all the login credentials that you need.
Example Sending Tools: Instantly.ai, Smartlead.ai, Apollo.io, Success.ai, Reply.io, Lemlist, Mailshake
Tip: If you haven't decided on a sending tool yet, we highly recommend Instantly & Smartlead (They allow you to add unlimited email accounts at no fee).
Within the first 2 weeks after payment, we guarantee 95-100% deliverability during the warmup measured by the warmup scores.
After that, we can’t guarantee it as your behaviour has an impact on it.
For example, if you don’t verify your email leads before sending.
(This is the case no matter which email infrastructure you use)
What makes us different is that you get a dedicated 1:1 dedicated deliverability consultant.
They will help you land in in the inbox at scale and let you know how to improve.
Additionally, for you to get the best performance, you’ll get access to our free deliverability guide.
You can easily cancel your subscription anytime by clicking here.