Mailwarmup vs Warmerly

Mailwarmup is a web service that aims to raise sender reputation by generating positive email engagement through a shared network of more than 10,000 inboxes. After users connect an account using SMTP and IMAP details, it sends scheduled messages on their behalf. Network inboxes open and reply to messages, mark them important, and remove them from spam. A dashboard tracks warmup results, including messages removed from spam, categories, and email deliverability. Listed integrations include Gmail, Outlook, and SMTP; users can control sending and limits. Other listed tools include a Mail Health Score, blacklist monitoring, delivery statistics, blacklist removal prompts, and AI ramp ups in beta. Warmup messages can be filtered into a separate folder using the subject keyword “WUA.” There is no free plan, but a 7-day trial is offered. Starter costs $19 a month for one email account and up to 50 positive engagements per day. Growth is $49 a month for three accounts and up to 50 engagements daily; Scale is $99 a month for eight accounts and up to 100 daily; Powerhouse is $149 a month for eight accounts and up to 300 daily. Warmup does not guarantee inbox placement.

Warmerly automates email warmup and checks deliverability for connected mailboxes. Its warmup feature sends threaded conversations with quoted replies and natural delays, and can recover warmup messages that end up in spam. InboxPulse checks SPF, DKIM, DMARC, MX and TLS daily. Google Workspace and Microsoft 365 connect through OAuth; other providers can connect over IMAP and SMTP, including Zoho and Namecheap Private Email. The service also lists LinkedIn warmup and outreach, plus WhatsApp messaging; LinkedIn costs $50/month per account separately. Plans include a free option with 100 campaign emails per month, and paid plans from $19/mo with a 7-day trial. Paid plans state that email sending is unlimited and unmetered. Warmerly runs on Android and the web, and offers an API. The operator says mailbox credentials and OAuth refresh tokens are encrypted at rest with AES-256-GCM, requests use TLS 1.2 or higher, and hosting and backups are in the European Union. The site names agencies, sales teams, telecom companies, lead-generation businesses, founders, SDRs and recruiters as users.