Warmup InboxWarmup Inbox Email Warmup

Warmup Inbox Email Warmup connects a sending mailbox over OAuth or SMTP to a shared network the vendor reports at more than 30,000 real inboxes. It then exchanges natural-looking messages that open, reply to, and rescue the user's mail in order to accumulate positive sender engagement, targeting teams whose new or dormant domains need to reach the primary inbox rather than spam.

The product also monitors deliverability, reporting inbox placement, spam and bounce rates, domain authentication records, and blacklist status, and it raises alerts when reputation declines. It supports Gmail, Outlook, Yahoo, Zoho, and custom SMTP providers, and the vendor positions it alongside separate outreach tools rather than as a replacement for them.