Winnr

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Winnr provides cold email infrastructure at scale. Buy domains, spin up SMTP mailboxes with automatic DKIM, SPF and DMARC configuration, and warm them up, all in under 10 minutes. Send thousands of messages per day at a fraction of Google Workspace pricing. Includes email warmup, deliverability monitoring, a unified inbox for replies, CSV export to sequencers like Smartlead and Instantly, webhooks, and an API. Built for outbound sales teams, lead generation agencies, and resellers.