What is Mailin?
Mailin is a private SMTP infrastructure provider built specifically for cold email outreach campaigns. Unlike shared email providers such as Google Workspace or Outlook, Mailin allocates dedicated servers and IP addresses to each customer, eliminating the deliverability risks associated with shared infrastructure where one sender’s poor reputation can impact all users on the same server.
The platform positions itself as an 83% more cost-effective alternative to traditional business email providers, offering mailboxes at $1.20/month compared to Google Workspace’s $7.20/month. Mailin handles the technical complexity of domain authentication, DNS configuration, and server management, allowing revenue teams to launch sending infrastructure in hours rather than days.
With a team that claims experience scaling cold email campaigns across 80+ different verticals, Mailin combines automated infrastructure provisioning with hands-on deliverability support. The service is designed for operators who need reliable inbox placement without the restrictions and flagging common to mainstream email platforms.
Core Services
Private Infrastructure Allocation
Mailin’s primary differentiator is separated server architecture. Each customer receives dedicated servers and IP addresses, ensuring that sender reputation is isolated and controllable. This private infrastructure model prevents the cross-contamination issues inherent in shared SMTP environments where one bad actor can damage deliverability for hundreds of accounts on the same IP range.
Domain Setup and Authentication
The platform offers two domain procurement paths. Customers can transfer existing domains to Mailin’s infrastructure with one-click migration, or purchase new domains directly through Mailin at $12–15/year with fully automated DNS configuration. When domains are purchased through Mailin, the team handles SPF, DKIM, and DMARC record setup, eliminating manual configuration steps that often cause authentication errors.
Mailbox Management
Mailin provisions mailboxes with automated setup designed for immediate sending. The platform creates email accounts, configures authentication records, and provides SMTP credentials through an intuitive dashboard built specifically for cold email workflows. Operators can manage contacts, monitor sending activity, and adjust settings without technical expertise.
Deliverability Operations
A dedicated deliverability team monitors inbox placement and provides guidance on best practices. Mailin guarantees inbox delivery for the first 21 days, leveraging private IPs and separated server infrastructure to achieve higher placement rates than shared providers. The team claims superior deliverability compared to Google and Outlook due to the absence of mainstream email provider flagging and blocking.
Security and Compliance
High-end encryption protocols protect data and communications across the platform. Mailin aligns infrastructure with industry security standards, though specific compliance certifications (SOC 2, GDPR attestations) are not publicly documented. The private server model provides inherent data isolation compared to multi-tenant shared environments.
Support and Expertise
24/7 support is provided by specialists who have scaled cold email campaigns across 80+ niches. This operational experience allows the team to advise on domain reputation, sending patterns, and deliverability optimization beyond basic SMTP troubleshooting.
Pricing & Engagement Models
Mailin’s pricing starts at $1.20 per mailbox per month, representing an 83% cost reduction compared to Google Workspace’s $7.20/month baseline. For teams sending over 100,000 emails monthly, a $299/month plan is available, though specific mailbox and volume limits are not publicly detailed.
Annual subscriptions receive a 20% discount, reducing the per-mailbox cost to approximately $0.96/month when paid upfront. Domain procurement through Mailin costs $12–15/year with included DNS setup, while customers transferring existing domains avoid additional domain fees.
Enterprise pricing and custom infrastructure configurations are available by contacting the sales team. Setup fees, onboarding costs, and SLA commitments beyond the 21-day deliverability guarantee are not publicly listed and likely require direct negotiation.
The model is per-mailbox pricing with no apparent sending volume caps or hidden overage charges, though operational best practices and sending limits to maintain deliverability are presumably enforced by the deliverability team.
Best Fit For
Mailin is purpose-built for cold email outreach teams that need reliable deliverability without the restrictions of mainstream email providers. The platform is particularly well-suited for:
- High-volume senders who need 50+ mailboxes and find Google Workspace or Microsoft 365 pricing prohibitive at scale
- Agencies and service providers managing multiple client campaigns who require isolated infrastructure per client to prevent reputation bleed
- Outbound-focused revenue teams that have experienced flagging, blocking, or deliverability degradation on shared SMTP services
- Operators with limited technical resources who need automated DNS setup and turnkey mailbox provisioning without manual configuration
- Teams seeking cost efficiency where infrastructure spend is a material line item and per-mailbox savings compound across dozens or hundreds of accounts
Mailin may be less appropriate for organizations requiring enterprise-grade compliance certifications, extensive third-party integrations with CRMs and sales engagement platforms, or documented SLAs for uptime and support response times.
Onboarding & Operations
The onboarding process emphasizes speed and automation. Customers can purchase or transfer domains, provision mailboxes, and begin sending within hours of signup. For domains purchased through Mailin, DNS configuration is handled automatically, eliminating the multi-day propagation and troubleshooting cycles common with manual SPF/DKIM/DMARC setup.
The platform provides an intuitive dashboard designed for users with minimal technical knowledge, offering straightforward interfaces for managing emails, contacts, and campaign settings. Integration details with third-party cold email sequencers, CRMs, or sales engagement platforms are not publicly documented, though SMTP credentials suggest compatibility with any tool supporting custom SMTP relay.
The 21-day deliverability guarantee provides a performance commitment for the initial ramp period, though specific inbox placement percentages or remediation protocols if the guarantee is not met are not disclosed. Ongoing deliverability relies on following best practices enforced by the support team, including proper sending volume ramp schedules, list hygiene, and content optimization.
Collaboration with the deliverability team is available 24/7, with support specialists offering guidance on domain reputation management, sending pattern optimization, and troubleshooting inbox placement issues based on experience across 80+ verticals.
Get Started
Mailin offers a cost-effective, private infrastructure alternative for teams prioritizing deliverability and affordability in cold email operations. Evaluate the platform by assessing whether the per-mailbox savings, automated setup, and private IP allocation align with your infrastructure requirements and volume projections.
Request a consultation to discuss enterprise pricing, SLA commitments, and integration capabilities with your existing outbound stack. Visit mailin.ai to review comparison charts against Google Workspace, Outlook, and other SMTP providers, or contact the team to validate deliverability claims with reference customers in your industry.