Selecting the right inbox setup method is an important first step in your cold email outreach. Reachkit offers two main options: mailboxes on new domains that Reachkit buys and sets up for you (Mega, Giga and Tera include a set number of domains for them), or connecting your existing email accounts.

Option 1: Done-For-You Setup (Included in Your Plan)

Mega, Giga and Tera include domains: 20 with Mega, 100 with Giga and 400 with Tera. Every domain comes with 3 mailboxes, so that’s 60, 300 and 1,200 mailboxes. Reachkit buys the domains and sets the mailboxes up for you through the Done-For-You setup. This is the easiest option if you’re starting fresh or want to expand your sending infrastructure without dealing with domain registrars and email providers yourself.

What You Get

Secondary domains (to protect your main domain’s reputation)
3 email inboxes on each of those domains (Google or Microsoft)
Full DNS and email configuration handled by Reachkit
Domain forwarding to your primary website
Inboxes automatically connected and ready to warm up

How It Works

When you buy Mega, Giga or Tera, you choose your domains right after the payment: Reachkit opens the domain setup on all the domains your plan includes, at no extra cost. To set them up from Inboxes instead, or to add more:

Go to Inboxes, click Add Inbox and select Set up domains, the Done-For-You card at the top. It shows how many of your plan’s domains are still free (for example 18 of 25). On Growth, Scale and lifetime plans the card is Full Done-For-You Setup
Enter your primary domain (e.g., yourcompany.com). Reachkit uses it to suggest similar secondary domains and as the default forwarding address. You don’t need to own it: if you don’t have a business domain yet, enter the name you’d like to send under (e.g., yourbrand.com)
Choose Google Workspace, Microsoft 365, or Mix for the whole order (Mix lets you pick per domain)
Choose how many domains to order, up to 400 in one order. It starts on the domains your plan still has free. Every domain gets 3 mailboxes. Reachkit picks the available secondary domains for you
Use the swap button next to a domain to replace it with another suggestion, or remove the ones you don’t want
Pick names for your senders and upload a profile picture
Set up domain forwarding (optional)
Confirm the order. Domains your plan includes cost nothing. If you order more domains than your plan includes, the same payment adds the rest as extra domains

Each inbox works up to 20 cold emails a day by default, so Mega’s 20 domains with 60 mailboxes send about 1,200 emails a day at full volume. New inboxes start lower and ramp up (3 a day on the first day, then more each day), so expect fewer at first. See Sending Limits and Ramp-Up. To estimate the number of domains and inboxes for your volume, use the free infrastructure calculator.

Once you confirm, your inboxes appear in the dashboard within moments, with a “Setting up inbox” status. You can configure inbox settings right away while Reachkit sets up the domains, DNS records, and email accounts in the background. Once setup completes, your inboxes are ready to start warming.

Pricing

The domains and mailboxes your plan includes cost nothing extra: they renew with your plan and are removed when it ends. Need more? Every domain past that is $19 a month ($190 a year on yearly billing), billed with your plan, and adds 3 mailboxes, about 60 emails a day. Order more domains than your plan includes and the same payment adds them. Cancel a domain and it works until your plan renews, then it’s removed and your next renewal no longer bills it.

You’ll see the exact total before you confirm. See Pricing and Plans for what each plan includes.

Using a Domain You Already Own

Done-For-You always buys new domains for you. It can’t set up inboxes on a domain you already own (for example, one bought at GoDaddy). To send from a domain you own, create the inboxes with your email provider (such as Google Workspace or Microsoft 365) and connect them as described below.

Option 2: Connect Your Own Inboxes

If you already have email accounts or prefer to set them up yourself through a domain registrar or inbox reseller, you can connect them directly to Reachkit.

Google & Microsoft

Google Workspace accounts connect with OAuth.
Personal Gmail (@gmail.com) accounts connect with an App Password, not OAuth. See Connecting Gmail to Reachkit.
Outlook, Office 365, and Exchange accounts connect with OAuth.

Advantages:

Use existing accounts with established reputation
Simple connection process

Only have a personal Gmail? It works: a personal @gmail.com address connects with an App Password (see Connecting Gmail to Reachkit). It’s a poor fit for cold email, though. You don’t control the gmail.com domain or its DNS, and any spam complaints land on your personal account. The inboxes your plan includes give you a domain of your own instead, set up through Done-For-You.

IMAP/SMTP

Connect email accounts from any provider that supports IMAP and SMTP.

Advantages:

Works with virtually any email provider
Complete flexibility in provider selection

Which Option Should You Choose?

Choose Done-For-You if:

You’re starting fresh with cold email
You want the fastest, simplest setup
You don’t want to deal with DNS, domain registrars, or email provider configuration
You need to scale up your sending infrastructure quickly

Choose Self-Connection if:

You already have email accounts ready to use
You have a preferred domain registrar or inbox provider
You want full control over your email infrastructure
You’re working with existing company email accounts

Recommendation for Beginners

If you’re new to cold email, Done-For-You is the easiest path. You’ll have properly configured domains and inboxes without needing to understand DNS records or email authentication setup.

Whichever option you choose, let your inboxes warm for at least 3 weeks before launching campaigns. Warmup runs automatically from the moment your inbox is connected.

Choosing the Right Inbox Setup