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Inbox Warmup
Kolkata, West Bengal, India
What it is
Inbox Warmup is a paid web and API service for connecting SMTP infrastructure, authenticating domains, warming sending activity, monitoring reputation signals, and running controlled campaigns from one dashboard. It supports ports 465 with SSL/TLS, 587 with STARTTLS, and compatible custom ports. Checks cover SPF, DKIM, DMARC, Return-Path, ownership, and tracking records. Warm-up automation increases activity gradually, rotates sending, respects mailbox limits, and can pause when health signals need attention. Campaign tools provide templates, personalization, timezone scheduling, hourly and daily limits, and pause or resume controls. Managed mailboxes include Gmail, Workspace, Outlook, Yahoo, and IMAP accounts, with Google Postmaster and Yahoo sender-data integrations listed. Launch costs $39 a month after a $1 first seven days; Growth is $99 a month and Professional is $199 a month under the same introductory billing. Agency pricing is custom. Credits reset after verified renewal and do not roll over. A free trial is available, but there is no free plan.
For and against
For
- Supports SMTP, API, and web access
- Checks SPF, DKIM, DMARC, and related records
- Gradual warm-up with mailbox-limit controls
- Campaign templates, personalization, and scheduling
- Free trial and multiple mailbox support
Against
- No free plan is available
- Monthly credits expire and do not roll over
- Warm-up does not guarantee inbox placement or replies
- Agency plan pricing is custom
The verdict
Inbox Warmup brings authentication checks, warm-up automation, mailbox management, and campaign controls together. Its paid plans differ by credits, sending limits, and support, while deliverability outcomes remain uncertified.
Who it suits
It is intended for sales and growth teams, agencies, and infrastructure teams managing multiple mailboxes or SMTP systems. Users needing warm-up controls, spam monitoring, and campaign scheduling may find its dashboard relevant.
Plans and prices
Launch
5,000 email credits/month · 75 emails/hour account-wide · unlimited authenticated domains · email support
Read 4 Oct 2026 · inboxwarmup.io
Growth
20,000 email credits/month · 200 emails/hour account-wide · unlimited authenticated domains · priority support
Read 4 Oct 2026 · inboxwarmup.io
Professional
100,000 email credits/month · 500 emails/hour account-wide · unlimited authenticated domains · API and webhook access
Read 4 Oct 2026 · inboxwarmup.io
Agency
Custom email credits · custom hourly speed · unlimited authenticated domains · multiple client workspaces
Read 4 Oct 2026 · inboxwarmup.io
On the record
- Campaign features
- Campaign tools include templates, message personalization, timezone scheduling, hourly and daily limits, and pause or resume controls.inboxwarmup.io · read 4 Oct 2026
- Credit rules
- One credit is deducted when an outgoing message is accepted by the configured SMTP server, monthly credits reset after each verified renewal, and credits do not roll over.inboxwarmup.io · read 4 Oct 2026
- Free tools
- The site offers free SPF and DMARC checkers, a warm-up calculator, an SMTP tester, and a deliverability audit request.inboxwarmup.io · read 4 Oct 2026
- Integrations
- The site lists Google Postmaster and Yahoo sender-data integration support.inboxwarmup.io · read 4 Oct 2026
- Intended users
- The site describes the product for sales and growth teams, agencies, and infrastructure teams.inboxwarmup.io · read 4 Oct 2026
- Mailbox providers
- The managed mailbox network lists Gmail, Workspace, Outlook, Yahoo, and IMAP accounts.inboxwarmup.io · read 4 Oct 2026
- Operator
- The site footer says Inbox Warmup is operated by Blueberry Web Solutions Pvt. Ltd.inboxwarmup.io · read 4 Oct 2026
- Placement limitation
- The site says warm-up can improve readiness but does not guarantee inbox placement, opens, or replies.inboxwarmup.io · read 4 Oct 2026
- Purpose
- Inbox Warmup connects SMTP infrastructure, authenticates domains, gradually warms sending activity, monitors reputation signals, manages replies, and supports controlled campaign sending from one dashboard.inboxwarmup.io · read 4 Oct 2026
- Security
- The site says SMTP credentials are designed to be encrypted at rest, scoped to the owning account, protected through sessions, and kept out of browser storage and application logs.inboxwarmup.io · read 4 Oct 2026
- SMTP and authentication
- It supports SMTP ports 465 with SSL/TLS, 587 with STARTTLS, and compatible custom ports, and checks SPF, DKIM, DMARC, Return-Path, ownership, and tracking records.inboxwarmup.io · read 4 Oct 2026
- Support
- The pricing page lists email support for Launch, priority support for Growth, priority technical onboarding for Professional, and dedicated onboarding and priority support for Agency.inboxwarmup.io · read 4 Oct 2026
- Warm-up controls
- Warm-up automation gradually increases activity, rotates safely, respects mailbox limits, and can pause when health signals need attention.inboxwarmup.io · read 4 Oct 2026
