ColdSire

​ColdSire is a cold email infrastructure platform designed to simplify and scale outbound email operations while maximizing deliverability. The platform handles the end-to-end setup of cold email environments, including bulk domain registration, mailbox creation, and full DNS configuration for authentication protocols like SPF, DKIM, and DMARC. By leveraging trusted providers like Google Workspace and Microsoft 365, ColdSire ensures inboxes are built on reputable infrastructure - helping users avoid spam folders and maintain sender reputation.

ColdSire is built with scale and efficiency in mind, offering centralized inbox management and seamless compatibility with leading cold outreach tools such as Instantly.ai and SmartLead. Its monitoring features provide ongoing visibility into domain performance and deliverability metrics, allowing users to optimize infrastructure health proactively as campaigns scale.

Key Features

• Automated SPF, DKIM, and DMARC Configuration: Sets up essential DNS records for secure, authenticated sending and improved inbox placement.
• Bulk Domain Registration & Mailbox Creation: Quickly launch cold outreach infrastructure across multiple domains and inboxes.
• Domain & Deliverability Monitoring: Tracks sender reputation, bounce rates, and authentication status to flag and fix potential issues.
• Centralized Inbox Management: Manage multiple inboxes across domains from a unified dashboard, streamlining operations.
• Seamless Platform Integration: Ready-to-use configurations compatible with outreach tools like Instantly.ai, SmartLead, and more.
• Google Workspace & Microsoft 365 Support: Infrastructure built on widely trusted email ecosystems to boost deliverability and reliability.

Pricing

• Domain Registration:
  • .com domains: $15 per year​
  • .co.uk domains: $12 per year​
  • Access to over 150 domain TLDs​
• Email Accounts:
  • Google Workspace: $6 per month per account​
  • Google Workspace (US Based): $10.80 per month per account​
  • Microsoft 365: $6 per month per account

Pros

• Comprehensive Setup: Automates complex configurations like DKIM, DMARC, and SPF.​
• Cost-Effective: Provides domain and email services at competitive rates.​
• User-Friendly: Simplifies the process of establishing a cold email infrastructure.​

Cons

• Limited Public Reviews: There is a scarcity of user feedback available online.​