What is ColdSire?
ColdSire provides pre-configured premium mailboxes on Google Workspace and Microsoft 365. Each account ships with full authentication records ready to send. Teams can launch cold email campaigns in minutes without manual DNS work.
ColdSire supplies dedicated cold email infrastructure built around premium Google and Microsoft mailboxes. Every mailbox arrives with SPF, DKIM, and DMARC records pre-configured, removing the need for manual DNS setup. The platform enforces true domain isolation, keeping each workspace separate to protect sender reputation across accounts. Users can centralize inbox management and connect directly to outbound sending tools through a one-click integration. Domain registration is available alongside mailbox provisioning, giving teams a single vendor for the entire sending foundation. The service targets cold emailers who want reliable inbox placement without managing infrastructure themselves.
Ideal Customer Profile
Startups, agencies, and SMBs running cold email campaigns who need premium mailboxes with strong deliverability and minimal setup effort.
Key Features
- Premium Google Workspace mailboxes
- Premium Microsoft 365 mailboxes
- Pre-configured SPF, DKIM, and DMARC
- True domain isolation per workspace
- Mailbox setup completed in minutes
- Centralized inbox management dashboard
- One-click integration with Instantly
- SmartLead integration supported
- Mixed real business mailbox pool
- Clean domain reputation maintained
How to use ColdSire
Teams sign up, register or connect a domain, and provision premium mailboxes through the dashboard. Each mailbox inherits pre-configured authentication records and a dedicated workspace. Users then link their accounts to outbound platforms like Instantly or SmartLead to begin sending campaigns.
Pricing
Starts at $6 per month per Google Workspace or Microsoft 365 mailbox. Domains cost $15 per year. No free trial is available.
Frequently Asked Questions
How do you get started with ColdSire?
Create an account, connect your domain, and provision premium mailboxes instantly. All authentication records are pre-configured so you can begin sending right away.
What does ColdSire cost?
Mailboxes cost $6 per month per account on either Google Workspace or Microsoft 365. Domain registration runs $15 per year per .com domain.
Why use ColdSire over other mailbox providers?
The platform offers true domain isolation and a mixed real-business mailbox pool to protect sender reputation. Pre-configured authentication records eliminate manual DNS work.
How does ColdSire handle email authentication?
Each dedicated workspace domain comes with optimized SPF, DKIM, and DMARC configurations out of the box. The platform integrates directly with outbound sending tools for seamless campaign execution.
Is there a free plan or trial?
No. ColdSire is a paid service with monthly mailbox plans and annual domain registration. There is no free tier or trial period.
Which outbound platforms does ColdSire integrate with?
ColdSire connects with Instantly and SmartLead through straightforward integrations. These connections let teams manage campaigns from their preferred sending platform.
