Introducing InboxKit, Smartlead’s trusted mailbox provider offering Google and Outlook mailboxes with full admin access. Enjoy pre-configured DNS authentication, enterprise-grade security, and optimized deliverability, all powered by SmartSenders.
Smartleaders, we’re introducing InboxKit as a Smartlead-trusted mailbox provider for users who need full administrative access and complete control over their sending infrastructure.
With InboxKit, you can purchase Google or Outlook mailboxes that come ready to use, pre-configured with DNS authentication, Multi-Factor Authentication (MFA), and Cloudflare Enterprise DNS.
You’ll have full access to your Google Workspace or Microsoft 365 Admin Dashboard, allowing you to manage your inboxes, domains, and security settings directly.
InboxKit mailboxes with Admin Access are available for:
$4.5 per mailbox (monthly)
$13 per domain (yearly)
Both Google and Outlook providers come fully configured, ensuring a fast and secure setup process.
InboxKit (Powered by SmartSenders) provides a seamless infrastructure setup that includes full admin control, unique workspaces or tenants for each domain, and automated DNS authentication (SPF, DKIM, DMARC).
Security is prioritized with MFA enabled by default and infrastructure managed under Enterprise Cloudflare DNS for maximum performance and reliability.
Average delivery time: ~48 hour
Pricing: $4.5/mailbox | $13/domain
Official Google Partner
Full access to Google Workspace Admin Dashboard (individual admin panel per domain)
Pre-configured with MFA and DNS setup (SPF, DKIM, DMARC)
Enterprise Cloudflare DNS
Each Google domain is hosted under an independent Google Workspace, ensuring isolation between senders, maintaining reputation, and improving overall deliverability.
Average delivery time: ~48 hours
Pricing: $4.5/mailbox | $13/domain
Full access to Microsoft 365 Workspace Admin Dashboard (individual tenant per domain)
Pre-configured with MFA and DNS setup (SPF, DKIM, DMARC)
Enterprise Cloudflare DNS
Each Outlook domain is provisioned under its own MS365 tenant, ensuring total control and optimal sender reputation across mailboxes.
Getting started with InboxKit mailboxes takes just a few minutes:
Log in to Smartlead → Go to Email Accounts → Add Account
Choose SmartSenders.
Select InboxKit Google or Outlook under Create Your Primary Inbox Optimized Infra.
Pick a Domain → Enter or choose a domain name (SmartSenders will suggest options if your preferred one isn’t available).
Choose domains and click on set up and next.
Set Up Mailboxes → Assign names, profile photos and persona apply for. Then click on save & next.
Note: The details you provide will be used as the name of the email account you are creating. Please ensure the correct information and image are used.
Auto-generated Mailboxes will be distributed among the selected names for each domain (e.g., 1 domain having 5 mailboxes with 2 names = 3 mailboxes for one name, 2 for the other name).
Add your contact Details
Review & Pay → Confirm your order (domains billed yearly, mailboxes monthly).
Once confirmed, your mailboxes and DNS configuration will be completed automatically, and admin access credentials will be shared.
Each domain supports 1–5 mailboxes.
InboxKit mailboxes include full admin access.
Domains and mailboxes are exclusive to Smartlead and non-transferable.
For InboxKit mailboxes, custom tracking is pre-configured, you’ll just need to verify your domain to start using it.
Go to Smartlead → Email Accounts
Enter Your Tracking Domain
For InboxKit, use the format:
open.domainname.com
(Replace domainname.com with your actual domain name.)
Verify the Domain
Click Verify to confirm ownership.
The custom tracking setup is already configured by default, verification activates tracking for your campaigns.
To maintain a healthy sender reputation and ensure consistent inboxing rates, follow these sending and warm-up guidelines:
Daily Sending Limit: 15–25 emails per mailbox
Time Gap Between Emails: Minimum 15 minutes
Warm-Up Volume: 20–30 warm-up emails/day
Daily Ramp-Up: Increase by 2–4 emails/day
Best Practice: Keep your warm-up active continuously, even after your campaigns go live. This stabilizes sending patterns and improves deliverability across all domains.
InboxKit gives Smartlead users complete control, reliability, and performance when building their outbound infrastructure
Manage your entire sending environment, users, domains, and security, directly from your Google Workspace or Microsoft 365 Admin Dashboard.
Pre-configured authentication Each domain is protected under Cloudflare Enterprise DNS with Multi-Factor Authentication (MFA) enabled by default for maximum safety
Fully compatible with SmartSenders infrastructure and warm-up engine for a seamless setup, monitoring, and scaling experience.
Predictable pay-as-you-go model: $4.5/mailbox (monthly) and $13/domain (yearly).
InboxKit is Smartlead’s trusted mailbox provider, offering Google and Outlook mailboxes with full admin access. Each mailbox comes pre-configured with DNS authentication (SPF, DKIM, DMARC), Multi-Factor Authentication (MFA), and Cloudflare Enterprise DNS, ensuring secure setup and optimized deliverability.
InboxKit eliminates the need for manual setup. You get:
Pre-authenticated domains and mailboxes ready to use.
Full access to Google Workspace or Microsoft 365 Admin Dashboards.
Dedicated tenants/workspaces per domain — improving sender reputation.
Enterprise-grade reliability via Cloudflare DNS and built-in MFA.
$4.5 per mailbox (monthly)
$13 per domain (yearly)
Pricing applies to both Google and Outlook mailboxes with full admin access.
InboxKit currently supports:
Google Workspace (Gmail) — powered by SmartSenders
Microsoft Outlook (Microsoft 365)
Each provider comes fully configured with DNS records, MFA, and a dedicated workspace or tenant.
Setup typically completes within ~48 hours after purchase.
Once ready, you’ll receive admin credentials and DNS will be fully configured automatically.
Log in to Smartlead → Go to Email Accounts → Click Add Account
Choose SmartSenders
Select InboxKit Google or InboxKit Outlook
Pick a domain (or let SmartSenders suggest one)
Assign mailbox names and photos
Review and pay — domains billed yearly, mailboxes monthly
After checkout, setup and DNS configuration start instantly.
Each domain supports 1–5 mailboxes (Google or Outlook).
Ye, all InboxKit mailboxes include full admin access to your Google Workspace or Microsoft 365 tenant.
You can manage users, security, and DNS settings directly.
No. InboxKit mailboxes and domains are exclusive to Smartlead and non-transferable to maintain security and deliverability standards.
To maintain a strong sender reputation:
Daily sending limit: 15–25 emails per mailbox
Time gap between sends: Minimum 15 minutes
Warm-up volume: 20–30 warm-up emails per day
Daily ramp-up: Increase by 2–4 emails/day
Best Practice: Keep warm-up running continuously, even after campaigns go live.
InboxKit mailboxes are pre-configured for fast warm-up compatibility with Smartlead.
You can connect them to your Smartlead warm-up engine immediately after setup, no DNS or manual authentication required.
InboxKit prioritizes account protection with:
Multi-Factor Authentication (MFA) enabled by default
Enterprise Cloudflare DNS for stability and anti-spam compliance
Isolated workspaces/tenants per domain
Reach out anytime via Smartlead Chat Support or email [email protected].
Our team can verify DNS propagation, fix MX or SPF mismatches, and re-provision mailboxes if needed.
Follow these SmartSenders best practices:
Keep warm-up active 24/7
Use plain-text or lightly formatted emails
Avoid excessive links or tracking pixels
Include unsubscribe links
Validate all leads before sending
Explore more SmartSenders resources and detailed guides to help you set up, manage, and optimize your cold email infrastructure.
Need More Help?If you encounter any setup issues or need assistance choosing between Google and Outlook, connect with Smartlead Chat Support — our deliverability specialists will help you configure and optimize your InboxKit setup.