Freedom251 › Email Warmup Software
Inbox Warmup
What Inbox Warmup is
Inbox Warmup is a web and API service for connecting SMTP infrastructure, checking domain authentication, warming sending activity, and managing email campaigns. It supports ports 465 with SSL/TLS, 587 with STARTTLS, and compatible custom ports, and checks SPF, DKIM, DMARC, Return-Path, ownership, and tracking records. Warm-up automation gradually raises activity, rotates sending, respects mailbox limits, and can pause when health signals need attention. Campaign controls include templates, personalization, timezone scheduling, hourly and daily limits, and pause or resume options. Its managed mailbox network lists Gmail, Workspace, Outlook, Yahoo, and IMAP accounts; Google Postmaster and Yahoo sender-data integrations are also listed. Plans start at $39 a month, billed at $39/month from day 8 after $1 for the first 7 days. Growth is $99 a month and Professional is $199 a month, each with the same first-week billing note. Agency pricing is custom. Credits reset after verified monthly renewals and do not roll over. The service does not guarantee inbox placement, opens, or replies.
Who it suits
Inbox Warmup is aimed at sales and growth teams, agencies, and infrastructure teams managing email sending. It may suit teams that need domain checks, controlled warm-up, and campaign controls in one dashboard.
What it does well
- Supports SSL/TLS, STARTTLS, and compatible custom SMTP ports
- Checks SPF, DKIM, DMARC, and other domain records
- Warm-up can pause when health signals need attention
- Includes campaign scheduling and sending limits
- Offers free SPF and DMARC checkers and an SMTP tester
What to know first
- No free plan
- Launch limits sending to 75 emails/hour account-wide
- Monthly credits do not roll over
- Warm-up does not guarantee inbox placement, opens, or replies
Limits
Launch includes 5,000 email credits per month and a 75 emails per hour account-wide limit. Credits reset after each verified monthly renewal and do not roll over. Launch billing is $1 for the first 7 days, then $39 a month from day 8.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Professional | $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 | $199 a month |
| Launch | $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 | $39 a month |
| Growth | $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 | $99 a month |
| Agency | Custom · Custom email credits · custom hourly speed · unlimited authenticated domains · multiple client workspaces · dedicated onboarding | On request |
As inboxwarmup.io lists them, read 4 Oct 2026. The maker's own page has the final word.
Getting started
- Visit Inbox Warmup’s website.
- Choose a plan; Launch, Growth, and Professional include a $1 first 7 days before monthly billing from day 8.
- Connect SMTP infrastructure using port 465 with SSL/TLS, port 587 with STARTTLS, or a compatible custom port.
- Authenticate a domain and review its SPF, DKIM, DMARC, Return-Path, ownership, and tracking records.
- Set warm-up controls and campaign limits for your mailboxes.
Verdict
Inbox Warmup combines SMTP setup checks, gradual warm-up, mailbox monitoring, and campaign controls. Consider the account-wide hourly limits and non-rolling credits when choosing a plan.
Questions
What does Inbox Warmup cost?
Launch is $39 a month, Growth is $99 a month, and Professional is $199 a month. Each has a $1 first 7 days, then monthly billing at its listed price from day 8; Agency is billed custom.
Is there a free plan or trial?
There is no free plan. A $1 first 7 days is listed for Launch, Growth, and Professional.
Which platforms does Inbox Warmup support?
The listed platforms are web and API.
Which mailbox providers are listed?
The managed mailbox network lists Gmail, Workspace, Outlook, Yahoo, and IMAP accounts.
Which integrations are listed?
The site lists Google Postmaster and Yahoo sender-data integration support.
Do unused monthly credits carry over?
No. Monthly credits reset after each verified renewal and do not roll over.
Facts from Inbox Warmup's own pages
- Campaign features
- Campaign tools include templates, message personalization, timezone scheduling, hourly and daily limits, and pause or resume controls. · inboxwarmup.io, 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, 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, 4 Oct 2026
- Headquarters
- Kolkata, West Bengal, India · inboxwarmup.io, 28 Sept 2026
- Integrations
- The site lists Google Postmaster and Yahoo sender-data integration support. · inboxwarmup.io, 4 Oct 2026
- Intended users
- The site describes the product for sales and growth teams, agencies, and infrastructure teams. · inboxwarmup.io, 4 Oct 2026
- Mailbox providers
- The managed mailbox network lists Gmail, Workspace, Outlook, Yahoo, and IMAP accounts. · inboxwarmup.io, 4 Oct 2026
- Operator
- The site footer says Inbox Warmup is operated by Blueberry Web Solutions Pvt. Ltd. · inboxwarmup.io, 4 Oct 2026
- Placement limitation
- The site says warm-up can improve readiness but does not guarantee inbox placement, opens, or replies. · inboxwarmup.io, 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, 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, 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, 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, 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, 4 Oct 2026
Where Inbox Warmup stands on Freedom251
- Email Warmup Software#15 of 24