Inbox Warmup
Inbox Warmup connects SMTP infrastructure, checks domain authentication, gradually warms sending activity, monitors reputation signals and supports campaigns…
What Inbox Warmup is
Inbox Warmup connects SMTP infrastructure, checks domain authentication, gradually warms sending activity, monitors reputation signals and supports campaigns from a web and API service. It supports ports 465 with SSL/TLS, 587 with STARTTLS and compatible custom ports. Domain checks cover SPF, DKIM, DMARC, Return-Path, ownership and tracking records. Warm-up controls can increase activity gradually, rotate sending, respect mailbox limits and pause when health signals need attention. Campaign tools include templates, personalization, timezone scheduling, hourly and daily limits, and pause or resume controls. Its managed mailbox network lists Gmail, Workspace, Outlook, Yahoo and IMAP accounts; integrations include Google Postmaster and Yahoo sender data. Security measures described by the site include encrypting SMTP credentials at rest and keeping them out of browser storage and application logs. Launch costs $39 a month after $1 for the first 7 days; Growth is $99 a month and Professional is $199 a month, each with the same initial billing period. Credits reset monthly and do not roll over. Warm-up does not guarantee inbox placement, opens or replies.
Good
- Checks SPF, DKIM, DMARC, Return-Path and tracking records.
- Warm-up can respect mailbox limits and pause when needed.
- Campaigns offer timezone scheduling and sending limits.
- Integrates with Google Postmaster and Yahoo sender data.
- Free SPF and DMARC checkers are available.
Watch out
- There is no free plan.
- Monthly credits do not roll over.
- Inbox placement, opens and replies are not guaranteed.
- Launch costs $39 a month after the first 7 days.
Who it suits
Inbox Warmup is aimed at sales and growth teams, agencies, and infrastructure teams that need to manage sending activity and campaigns. It may suit users seeking SMTP checks, warm-up controls and reputation monitoring in one service.
Verdict
Inbox Warmup brings SMTP setup checks, gradual warm-up and campaign controls together, with plans starting at $39 a month after the initial $1 seven-day period. Its own stated limitation is important: warm-up does not guarantee inbox placement or engagement.
Plans and prices
From Inbox Warmup's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Launch | $39 a month | 5,000 email credits/month · 75 emails/hour account-wide · unlimited authenticated domains · email support · $39/month from day 8; $1 for the first 7 days |
| Growth | $99 a month | 20,000 email credits/month · 200 emails/hour account-wide · unlimited authenticated domains · priority support · $99/month from day 8; $1 for the first 7 days |
| Professional | $199 a month | 100,000 email credits/month · 500 emails/hour account-wide · unlimited authenticated domains · API and webhook access · $199/month from day 8; $1 for the first 7 days |
| Agency | Priced on request | Custom email credits · custom hourly speed · unlimited authenticated domains · multiple client workspaces · dedicated onboarding · Custom |
The facts
Each one read from Inbox Warmup's own pages, with the date it was checked.
What it does
- Campaign features
- Campaign tools include templates, message personalization, timezone scheduling, hourly and daily limits, and pause or resume controls.checked 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.checked 4 Oct 2026
- Integrations
- The site lists Google Postmaster and Yahoo sender-data integration support.checked 4 Oct 2026
- Intended users
- The site describes the product for sales and growth teams, agencies, and infrastructure teams.checked 4 Oct 2026
- Mailbox providers
- The managed mailbox network lists Gmail, Workspace, Outlook, Yahoo, and IMAP accounts.checked 4 Oct 2026
- Operator
- The site footer says Inbox Warmup is operated by Blueberry Web Solutions Pvt. Ltd.checked 4 Oct 2026
- Placement limitation
- The site says warm-up can improve readiness but does not guarantee inbox placement, opens, or replies.checked 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.checked 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.checked 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.checked 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.checked 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.checked 4 Oct 2026
Money
- Free tools
- The site offers free SPF and DMARC checkers, a warm-up calculator, an SMTP tester, and a deliverability audit request.checked 4 Oct 2026
The company
- Headquarters
- Kolkata, West Bengal, Indiachecked 28 Sep 2026
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