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Inbox Warmup

inboxwarmup.io

From $39/mo Free trial WebAPI
Visit inboxwarmup.io
Spec score 8.0 #13 of 24 in Email Warmup Software

What it is

Inbox Warmup connects SMTP infrastructure, authenticates domains, warms sending activity, monitors reputation signals, manages replies, and controls campaigns from a web and API dashboard. It supports SMTP ports 465 with SSL/TLS, 587 with STARTTLS, and compatible custom ports. Checks include 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. Listed mailbox providers include Gmail, Workspace, Outlook, Yahoo, and IMAP accounts, with Google Postmaster and Yahoo sender-data integrations. Launch costs $39 a month after a $1 first seven days; Growth is $99 a month and Professional $199 a month on the same terms. Agency pricing is custom. Credits reset monthly and do not roll over.

Spec sheet

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.Read 4 Oct 2026 · inboxwarmup.io
Intended users
The site describes the product for sales and growth teams, agencies, and infrastructure teams.Read 4 Oct 2026 · inboxwarmup.io
Integrations
The site lists Google Postmaster and Yahoo sender-data integration support.Read 4 Oct 2026 · inboxwarmup.io
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.Read 4 Oct 2026 · inboxwarmup.io
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.Read 4 Oct 2026 · inboxwarmup.io
Headquarters
Kolkata, West Bengal, IndiaRead 28 Sep 2026 · inboxwarmup.io
Campaign features
Campaign tools include templates, message personalization, timezone scheduling, hourly and daily limits, and pause or resume controls.Read 4 Oct 2026 · inboxwarmup.io
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.Read 4 Oct 2026 · inboxwarmup.io
Free tools
The site offers free SPF and DMARC checkers, a warm-up calculator, an SMTP tester, and a deliverability audit request.Read 4 Oct 2026 · inboxwarmup.io
Mailbox providers
The managed mailbox network lists Gmail, Workspace, Outlook, Yahoo, and IMAP accounts.Read 4 Oct 2026 · inboxwarmup.io
Operator
The site footer says Inbox Warmup is operated by Blueberry Web Solutions Pvt. Ltd.Read 4 Oct 2026 · inboxwarmup.io
Placement limitation
The site says warm-up can improve readiness but does not guarantee inbox placement, opens, or replies.Read 4 Oct 2026 · inboxwarmup.io
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.Read 4 Oct 2026 · inboxwarmup.io
Warm-up controls
Warm-up automation gradually increases activity, rotates safely, respects mailbox limits, and can pause when health signals need attention.Read 4 Oct 2026 · inboxwarmup.io

Plans and prices

Launch $39 a month $39/month from day 8; $1 for the first 7 days 5,000 email credits/month · 75 emails/hour account-wide · unlimited authenticated domains · email support Read 4 Oct 2026 · inboxwarmup.io
Growth $99 a month $99/month from day 8; $1 for the first 7 days 20,000 email credits/month · 200 emails/hour account-wide · unlimited authenticated domains · priority support Read 4 Oct 2026 · inboxwarmup.io
Professional $199 a month $199/month from day 8; $1 for the first 7 days 100,000 email credits/month · 500 emails/hour account-wide · unlimited authenticated domains · API and webhook access Read 4 Oct 2026 · inboxwarmup.io
Agency Priced on request Custom Custom email credits · custom hourly speed · unlimited authenticated domains · multiple client workspaces · dedicated onboarding Read 4 Oct 2026 · inboxwarmup.io

Every Inbox Warmup plan and price →

Strong points and limits

Strong points

  • Supports SSL/TLS and STARTTLS SMTP ports
  • Checks SPF, DKIM, and DMARC records
  • Warm-up can pause on health concerns
  • Campaigns include scheduling and limits
  • Multiple mailbox providers are listed

Limits

  • No free plan
  • Warm-up does not guarantee inbox placement
  • Monthly credits do not roll over
  • Agency pricing is custom

Who it suits

The service is described for sales and growth teams, agencies, and infrastructure teams managing multiple mailboxes or controlled sending. It offers web and API access plus custom warm-up schedules and spam monitoring.

Verdict

Inbox Warmup combines SMTP checks, warm-up controls, reputation signals, and campaign management. Its plans have explicit credit and hourly limits, while placement outcomes remain unguaranteed.

Where Specifiction places it

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