Warmbox

Warmbox is an email warm-up tool that helps sales and marketing teams increase their cold email deliverability by raising inbox reputation. It connects to any email provider (Gmail, Outlook, Yahoo, iCloud, AOL, Yandex, Zoho, Sendgrid, Sendinblue, Amazon SES, Mailgun, or any SMTP inbox) and automatically sends realistic emails from the user's inbox, removes emails from spam folders, opens and bookmarks them, and replies to a portion of them to generate positive interactions. The tool leverages a private network of over 35,000 inboxes across major email service providers to improve sender reputation globally. Users can monitor deliverability results through detailed reports and dashboards. Warmbox features include auto-remove from spam, auto-reply, mark as favorite, spam score monitoring, human-like interactions using GPT-4 and hybrid methods, customizable warm-up schedules, growth/flat/random warm-up modes, a live email checker for DNS and blacklist status, multi-account support for agencies, team member management, in-app onboarding, a help center, live chat support, and an affiliate program.