Mystrika
Inboxing provides automated setup of premium business email inboxes with 49 inboxes per domain and API access for scalable cold email campaigns.
Inboxing is a specialized email infrastructure tool designed for businesses that rely on cold email outreach to drive conversations and generate leads. It automates the entire process of setting up premium business inboxes on Microsoft's network, handling mailbox creation, DNS configuration, and compliance checks so users can start sending within hours. The platform is built for teams managing multiple domains, from startups testing a few domains to agencies running over a thousand.
What sets Inboxing apart is its combination of automation and scale. Each domain comes with 49 inboxes, and the system handles SPF, DKIM, and Strict DMARC records automatically. The tool also offers full API access, allowing users to integrate domain provisioning directly into their own workflows. This makes it a strong fit for power users who want to programmatically manage large numbers of mailboxes without manual intervention.
Pricing is volume-based and drops as you scale. The Starter plan costs $30 per domain for 1-100 domains, the Growth plan is $25 per domain for 101-500, and the Scale plan is $20 per domain for 501-1500. Custom pricing is available for larger volumes. Each plan includes the same features: 49 inboxes per domain, 250 outbound emails per day per domain, automated setup, 24-hour turnaround, and premium support. There is no free tier or trial, but the setup is fast enough that you can be sending within a day of purchase.
Inboxing is best for outbound sales teams, lead generation agencies, and anyone running cold email campaigns at scale. It is not designed for bulk marketing emails or high-volume transactional sending. The 250-emails-per-day-per-domain cap is intentional to maintain deliverability and avoid spam flags. If your use case involves steady, targeted outreach across many domains, Inboxing delivers a hands-off experience that reduces the operational overhead of managing inbox infrastructure.
Overall, Inboxing fills a specific niche well. It removes the friction of setting up and maintaining hundreds of mailboxes, and its API-first approach appeals to technical teams. The main trade-offs are the per-domain cost and the lack of a trial, but for organizations that already know they need premium inboxes at scale, the speed and reliability justify the investment.
Features
- Automated inbox setup
- Premium inboxes included (49 per domain)
- Easy DNS configuration (SPF, DKIM, Strict DMARC)
- 24-hour support availability
- Scalable domain management (1 to 1500+ domains)
- Full API access
- Tenant-safe architecture
- Multi-name input or CSV upload
- Full deletion and domain swapping
- 250 outbound emails per day per domain
Pricing
Pros
- Fully automated mailbox creation and DNS configuration
- 49 inboxes per domain for high sending volume
- API-first design for seamless integration
- 24-hour turnaround from setup to sending
- Premium 1-on-1 support via WhatsApp, email, and chat
Cons
- No free tier or trial available
- Setup complexity rated as advanced (requires nameserver changes)
- Pricing is per domain, which can add up for large volumes
Best For
Teams and agencies that need reliable, high-deliverability inboxes for cold email outreach at scale