InboxKit
InboxKit is the leading cold email infrastructure platform that automates domain and mailbox provisioning at scale. We help cold email agencies, sales teams, and outbound consultancies set up Google Workspace and Microsoft 365 mailboxes in minutes, not hours. Key features include automated DNS configuration, one-click export to 15+ sequencers (Instantly, SmartLead, Lemlist, Reply.io, etc.), real-time deliverability monitoring, and bulk mailbox management. As an official Google Cloud Partner and Microsoft Partner, we provide enterprise-grade infrastructure without the manual setup overhead.
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ScaledMail
ScaledMail is a specialized email infrastructure platform designed to support large-scale cold email outreach campaigns while maintaining high deliverability and sender reputation. It provides businesses with preconfigured email infrastructure that allows them to send large volumes of outbound emails without needing to manually set up domains, mailboxes, or technical authentication systems. Instead of building and maintaining dozens of individual email accounts, users receive ready-to-use inbox environments distributed across multiple domains, which helps distribute sending volume and reduce the risk of emails being flagged as spam. It automates complex technical requirements such as DNS configuration and email authentication protocols, including SPF, DKIM, and DMARC, ensuring messages are properly verified and more likely to reach recipients’ primary inboxes.
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Infraforge
Infraforge offers private cold email infrastructure with dedicated IPs, enabling users to set up domains and mailboxes in minutes. Features include proxies, SSL, domain masking, prewarmed domains, and mailboxes, all with free DNS setup. The platform supports multi-IP provisioning and provides an API for seamless integration. Infraforge is designed to help users take control of their email deliverability and scale their outreach efficiently. Create hundreds of domains and mailboxes using distributed email infrastructure with premium deliverability and free automated setup. Private email infrastructure with the ability to set private IPs, API, domain masking proxies, and more. Mailbox slots allow you to delete and create new mailboxes without any additional cost, as you are charged based on the number of slots, not the number of active mailboxes.
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Zapmail
Zapmail is a cold email infrastructure tool that simplifies the setup and management of Google Workspace mailboxes for high-volume outreach. It automates domain and mailbox creation, manages SPF, DKIM, and DMARC configurations, and ensures high deliverability, making it an ideal solution for agencies and freelancers running cold email campaigns. Zapmail offers features such as automated mailbox and domain setup, Google Workspace integration at discounted rates, bulk exports to cold email tools like Instantly and ReachInbox, AI-powered deliverability optimization, and API access with DNS management. With Zapmail, users can easily purchase Google Workspace email accounts at reasonable prices, schedule and send campaigns from unlimited accounts while keeping their domain reputation safe, and manage everything in one place to boost outreach performance.
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