Coldsire

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Coldsire is a done-for-you cold email infrastructure solution, designed to maximize deliverability and scale outbound email outreach without spam issues. Automated Inbox & Domain Setup – Set up and warm up email inboxes in minutes. Seamless Integration – Works with Smartlead, Instantly, Lemlist, and other cold email automation tools. Email Deliverability Optimization – Ensures emails land in inboxes, not spam. Scalable for Agencies & B2B Sales – Supports lead generation agencies and outbound sales teams. Used by 600+ agencies, Coldsire helps businesses boost open rates by 40% and increase lead generation by 25% through optimized cold email systems.