EmailWarmup

What EmailWarmup is

EmailWarmup uses automated mailbox exchanges and AI-generated messages to help build sender reputation for cold email. Connected mailboxes are paired bidirectionally with other active mailboxes in its network. Subjects and replies use rotating topics and tones, and retain a [WARMUP] subject tag. Users can choose slow, medium, or fast ramp-up speeds that gradually raise sending volume over days. Engagement features include threaded replies, reads, stars, spam-folder rescue, and delivery checks. Gmail can be connected with OAuth, while other mailbox connections can use SMTP/IMAP credentials. The service says those credentials are encrypted at rest, mailbox access is scoped to the user account, and it does not read or store personal email content. It retains account data while an account is active and says deleted account data is removed within 30 days. EmailWarmup is available on web and API. A free plan is listed, and Starter costs $19 a month. The maker says paid limits are enforced in the app, but billing is not connected yet and paid plans are enabled manually; Starter checkout is described separately as available through Dodo Payments.

Who it suits

The maker names founders, agencies, recruiters, sales teams, creators, and operators as intended users. It suits people warming mailboxes, but not those seeking outreach campaign sending or a guarantee of inbox placement.

Limits

The Community plan lists one mailbox, 10 warmup emails per day, up to three active peers per mailbox and three emails per day per campaign. Starter lists three mailboxes, 100 warmup emails per day, up to eight active peers per mailbox and 10 emails per day per campaign.

Getting started

1. Open the EmailWarmup website.
2. Choose a plan, or use the listed Community plan.
3. Connect Gmail with OAuth or provide SMTP/IMAP credentials.
4. Choose a slow, medium or fast warmup pace.
5. Use the web app or API.

Verdict

EmailWarmup provides mailbox warmup exchanges, engagement actions, and adjustable ramp-up speeds, with stated protections for credentials and personal email content. Note that it does not send campaigns or guarantee inbox placement, and paid access currently involves manual enablement.