General Questions

What is Mission Inbox?

Mission Inbox is an Email Infrastructure-as-a-Service (IaaS) platform that provides dedicated, isolated email sending infrastructure. It is built for sales teams, marketing agencies, enterprises, developers, and anyone who needs reliable email deliverability at scale.

What makes Mission Inbox different from other email providers?

Mission Inbox operates its own servers and dedicated IP addresses. Unlike competitors that use shared infrastructure or resell Gmail/Outlook, Mission Inbox provides 100% isolated infrastructure per customer with AI pre-send scanning (MI Shield) to protect domain reputation.

Is Mission Inbox cold email friendly?

Yes. Unlike SendGrid, Mailgun, Resend, and other legacy providers, Mission Inbox does NOT ban cold email. It is purpose-built for outreach while enforcing quality through MI Shield.

What is a Cube?

A Cube is Mission Inbox's dedicated server unit. Each customer gets one or more Cubes — isolated virtual servers with dedicated IPs for specific email workloads (Sales, Marketing, Transactional, Financial).

What is MI Shield?

MI Shield is Mission Inbox's AI pre-send spam filter. It analyzes every email before it is sent and blocks messages that would likely trigger spam filters or damage domain reputation.

Pricing & Plans Questions

How much does Mission Inbox cost?

Pricing starts at $199/month. Plans scale based on number of Cubes, sending volume, and features needed.

What is included in the base plan?

The base plan ($199/month) includes:

• 1 dedicated Cube (server)
• 2-3 dedicated IPs
• MI Shield AI protection
• SPF, DKIM, DMARC auto-configuration
• Basic analytics
• Email support

Can I upgrade or downgrade my plan?

Yes. Upgrade or downgrade anytime. Changes take effect immediately with pro-rated pricing. Minimum plan is $199/month.

Do you offer a free trial?

No. Mission Inbox does NOT offer free trials. The $199/month starting price is positioned as affordable enough to get started without a trial.

Do I get shared IPs or dedicated IPs?

Dedicated IPs. Every customer gets 2-3 dedicated IPs depending on volume.

Setup & Technical Questions

How long does setup take?

Less than 5 minutes with Cloudflare or GoDaddy (1-click DNS automation). 15-30 minutes with manual DNS configuration for other registrars.

Do I need to buy domains from Mission Inbox?

No. Users bring their own domains. Mission Inbox automatically updates DNS records (SPF, DKIM, DMARC) via integration with Cloudflare, Spaceship and GoDaddy.

How does DNS configuration work?

Mission Inbox auto-pushes SPF, DKIM, and DMARC records directly to Cloudflare or GoDaddy. For other registrars, manual configuration is required using provided record values.

What email platforms does Mission Inbox work with?

Mission Inbox works with any platform that supports standard SMTP: Instantly, Smartlead, Lemlist, Apollo, HubSpot, Klaviyo, Mailchimp, and all other major tools.

How is workload isolation handled?

Each email type (Sales/Marketing, Transactional, Financial/Legal) runs on a separate Cube with separate server instances. Each email workload (Sales, Marketing, Transactional, Financial) runs on its own Cube with dedicated resources, ensuring no cross-contamination between email types.

Deliverability Questions

What is the delivery rate?

90% delivery rate with real-time delivery confirmation.

What is the API latency?

Less than 50ms average API latency for transactional emails.

How does IP warmup work?

Mission Inbox handles IP warmup automatically. New IPs are warmed gradually to build sender reputation, with no manual configuration required.

Will my transactional emails be affected by marketing campaigns?

No. Each email type runs on isolated infrastructure (Cubes). Marketing campaigns cannot affect transactional email deliverability, and vice versa.

Security & Compliance Questions

What compliance certifications does Mission Inbox have?

Mission Inbox supports SOC 2 compliance requirements.

How long are email logs retained?

Standard retention is 30 days. Extended retention up to 7 years is available for legal and financial compliance use cases.

Is data encrypted?

Yes. TLS 1.3 encryption for all email transmission and at-rest encryption for stored data.

Competitor Comparison Questions

How is Mission Inbox different from SendGrid?

SendGrid uses shared IP pools and restricts cold email. Mission Inbox provides isolated infrastructure with dedicated IPs and no cold email bans.

How is Mission Inbox different from Mailgun?

Mailgun is a developer-first transactional API that restricts cold email via compliance filters. Mission Inbox is outreach-first with isolated infrastructure and no compliance bottlenecks.

How is Mission Inbox different from Resend?

Resend is an AWS SES wrapper that bans cold email. Mission Inbox owns its infrastructure and is purpose-built for outreach.

How is Mission Inbox different from Mailreef/Maildoso/Mailforge/Hypertide?

Those companies resell Gmail/Outlook infrastructure with shared pools and no AI protection. Mission Inbox operates its own servers and IPs with isolated infrastructure and MI Shield protection.

How is Mission Inbox different from Google Workspace for sending?

Google Workspace caps sending at 200-500/day and bans accounts for cold outreach. Mission Inbox sends 30M+/month on isolated infrastructure with zero workspace risk.

How is Mission Inbox different from Microsoft 365/Outlook for sending?

Microsoft 365 caps at 300-500/day and bans cold email, risking your entire workspace. Mission Inbox has no daily limits and runs on separate infrastructure.

Sales Engagement Platforms

Why is my DKIM not showing in Instantly or Smartlead?

These systems have a very set ways of looking for DKIMs as google and Microsoft DNS records always have the same "selectors". Nontheless, Mission Inbox changes the selector for every domain added, as all cubes are isolated. This tends to cause SEPs to not recognize them, even when DKIM are present. You can ignore it, you will still be able to send.

FYI, a selector is the Host name of the DKIM DNS record.

Support Questions

How do I contact support?

• Chat: Live chat at missioninbox.com
• Email: success@missioninbox.com
• Phone: +1 (512) 270-1303

What are support hours?

Support is available via live chat and email. Enterprise customers receive dedicated account manager support.

Updated on: 27/02/2026