Connect any SMTP
Add your SMTP server, securely test credentials, verify sender permissions, and detect port, TLS, or provider restrictions before sending.
Ports 465, 587 & custom
Inbox warm-up and sender reputation, without the complexity
Build sender trust. Improve readiness. Scale with clarity.
Inbox Warmup helps you connect SMTP, authenticate every sending domain, increase activity gradually, monitor reputation signals, and prepare for responsible campaign sending from one beautifully simple platform.
Already have an Inbox Warmup account? Go directly to Dashboard →
Guided setup · Transparent reputation signals · Flexible monthly plans
Encrypted credentials · Account-isolated data · Responsible sending controls
inboxwarmup.io/dashboard
JP
Good morning, Jordan
Your sending infrastructure is healthy and warming steadily.
DOMAIN HEALTH
94%
↑ 8% this week
WARM-UP SENT
12.8K
Steady growth
REPLY RATE
38.6%
↑ 4.2%
AUTHENTICATION
3/3
SPF · DKIM · DMARC
Warm-up volumeLast 30 days ▾
Domain healthLive
SPF configured✓
DKIM signing✓
DMARC alignment✓
SMTP connection✓
Domain authenticatedSPF · DKIM · DMARC
Warm-up runningDay 18 · steadily growing
↗
Health improving+8% this week
465 / 587SSL, TLS & STARTTLS
24/7Automated health monitoring
3-in-1SPF, DKIM & DMARC checks
365 daysTechnical support access
SMTP diagnosticsDNS verificationSmart warm-upThreaded repliesReputation monitoringCampaign controls
Everything in one place
All the tools you need to build healthier email sending.
Inbox Warmup brings SMTP setup, domain authentication, warm-up, placement monitoring, and controlled sending into one clear workflow—so beginners can start confidently and experienced teams can stay in control.
Guided domain authentication
Generate and verify SPF, DKIM, DMARC, Return-Path, ownership, and tracking records with clear instructions and real status checks.
Setup without guesswork
Smart warm-up automation
Start low, increase gradually, rotate safely, respect mailbox limits, and pause automatically when health signals need attention.
Controlled volume growth
Natural conversation replies
Create authentic engagement with threaded replies, Message-ID tracking, conversation history, and controlled reply limits.
Replies stay in the thread
Reputation Center
Monitor authentication, bounce trends, placement signals, reply activity, SMTP health, and provider data from a single view.
Actionable recommendations
Campaign-ready sending
Create templates, personalize messages, schedule by timezone, set hourly and daily limits, and pause or resume whenever needed.
Built for controlled scaling
Managed mailbox network
Use admin-managed Gmail, Workspace, Outlook, Yahoo, or IMAP accounts with mailbox-level health, limits, and authentication status.
Flexible provider support
Inbox & spam processing
Detect approved Inbox Warmup messages in Inbox, Spam, or Junk, move them when allowed, and record every result transparently.
Placement-aware workflows
Detailed logs & diagnostics
See connection results, provider responses, failed tasks, queue status, DNS problems, and exact next steps instead of vague errors.
Clear answers, faster fixes
Free checks before you scale
Free tools for domain, SMTP and warmup readiness.
Use these Inbox Warmup tools to check DNS records, estimate safe volume and test SMTP setup before starting or scaling campaigns.
SPF Checker
Check whether your domain has a valid SPF record before sending.
Use free tool →DMARC Checker
Review your DMARC policy and basic authentication readiness.
Use free tool →Warmup Calculator
Estimate a safer ramp-up timeline for domains and mailboxes.
Calculate now →SMTP Tester
Test SMTP host, port, encryption and credentials before setup.
Test SMTP →Deliverability Audit
Share your domain and sending problem for a free setup review.
Request audit →All Free Tools
Open the full free tool hub for DNS, SMTP and warmup checks.
View all tools → Simple setup
From new domain to controlled sending in four steps.
Inbox Warmup guides you through every important setup step before warm-up begins.
Watch the complete setup guide before starting your first warm-up.
→
Connect SMTP
Add your SMTP host, port, encryption, username, and sender. Inbox Warmup securely tests the connection and shows exact fixes when something fails.
→
Verify your domain
Publish the suggested SPF, DKIM, DMARC, and tracking records, then let Inbox Warmup check authentication and alignment.
→
Start warm-up
Choose a safe starting limit. Inbox Warmup gradually increases activity while tracking replies, placement signals, and SMTP health.
Scale with confidence
Use your reputation data, domain health, and sending limits to decide when your infrastructure is ready for larger campaigns.
Reputation you can understand
Know what is working before you increase volume.
Inbox Warmup turns technical sending signals into clear health checks and practical actions your team can follow.
✓Received-message checks for SPF, DKIM, and DMARC results
✓Domain, SMTP, mailbox, and worker health in one dashboard
✓Google Postmaster and Yahoo sender-data integration support
✓Automatic pausing and re-verification after risky changes
✓No misleading “delivered” label when a server only accepted the email
Domain reputation
Live infrastructure overview
IW
ready-to-send.com
96Health score
GO
growth-outbound.com
91Health score
AL
acme-leads.io
88Health score
SPF
Passing
DKIM
Signing
DMARC
Aligned
Transparent plans
Start free for 7 days, then continue on the plan you selected.
Choose Launch, Growth, or Professional and authorize the subscription. You receive a 7-day free demo with 100 credits; the first charge happens after day 7 and the plan then renews monthly until cancelled from Billing.
Launch
For individuals and smaller sending operations building reliable habits.
$39/month
7 days free · first charge after day 7 · renews monthly
Start Launch Demo
✓ 5,000 email credits
✓ 75 emails/hour account-wide
✓ Unlimited authenticated domains
✓ SMTP connection testing
✓ SPF, DKIM & DMARC checks
✓ Smart warm-up scheduling
✓ Email support
MOST POPULAR
Growth
For growing teams that need stronger capacity, automation, and visibility.
$99/month
7 days free · first charge after day 7 · renews monthly
Start Growth Demo
✓ 20,000 email credits
✓ 200 emails/hour account-wide
✓ Unlimited authenticated domains
✓ Advanced reputation monitoring
✓ Threaded reply automation
✓ Campaign scheduling & limits
✓ Priority support
Professional
For established sending operations that need scale and deeper controls.
$199/month
7 days free · first charge after day 7 · renews monthly
Start Professional Demo
✓ 100,000 email credits
✓ 500 emails/hour account-wide
✓ Unlimited authenticated domains
✓ Team roles & permissions
✓ API and webhook access
✓ Consolidated reporting
✓ Priority technical onboarding
Agency
For agencies and infrastructure teams managing custom client volume.
Custom
Talk directly with our team
✓ Custom email credits
✓ Custom hourly speed
✓ Unlimited authenticated domains
✓ Multiple client workspaces
✓ Custom infrastructure setup
✓ Dedicated onboarding
✓ Priority support
One credit is deducted when an outgoing message is accepted by the configured SMTP server. Every eligible new subscription begins with 100 demo credits for 7 days. The selected plan is charged after day 7 and renews monthly until cancelled; monthly credits reset after each verified renewal and do not roll over. Warm-up improves readiness but does not guarantee inbox placement, opens, or replies.
Compare plans
Everything your team needs, clearly explained.
| Feature | Launch | Growth | Professional | Agency |
|---|---|---|---|---|
| Email credits after demo | 5,000 / month | 20,000 / month | 100,000 / month | Custom |
| 7-day demo | 100 credits | 100 credits | 100 credits | Custom onboarding |
| Account-wide hourly speed | 75 | 200 | 500 | Custom |
| Authenticated domains | Unlimited | Unlimited | Unlimited | Unlimited |
| SMTP & authentication checks | ✓ | ✓ | ✓ | ✓ |
| Reputation monitoring | Core | Advanced | Advanced | Custom |
| Campaign scheduling | Core | ✓ | ✓ | ✓ |
| Team roles & API access | — | Limited | ✓ | ✓ |
| Support | Priority | Priority onboarding | Dedicated |
Built for every growth stage
One clear system for teams that take sending seriously.
Start with guided setup, then unlock deeper controls as your domains, mailboxes, and client accounts grow.
01
Sales & growth teams
Prepare domains, catch SMTP problems early, and increase sending gradually without depending on scattered tools.
02
Agencies
Manage multiple domains, workspaces, mailbox pools, team access, and client reputation from one premium dashboard.
03
Infrastructure teams
Inspect authentication, queues, workers, provider responses, and failures with precise diagnostics and auditability.
Frequently asked questions
Everything you need to know before starting.
Inbox Warmup helps you connect SMTP infrastructure, authenticate domains, gradually warm up sending activity, monitor reputation signals, manage replies, and prepare for controlled campaign sending from one dashboard.
Yes. Inbox Warmup supports common SMTP configurations including port 465 with SSL/TLS, port 587 with STARTTLS, and compatible custom ports. Availability still depends on your provider and hosting network.
No legitimate platform can guarantee inbox placement. Inbox Warmup helps improve infrastructure readiness and provides monitoring, but results also depend on content, list quality, engagement, domain history, complaints, and mailbox-provider policies.
No. The setup is guided step by step. Inbox Warmup shows the DNS records to add, tests your SMTP connection, checks authentication, and explains errors in clear language.
Inbox Warmup is designed to encrypt credentials at rest, scope them to the owning account, protect sessions, and keep sensitive values out of browser storage and application logs.
Yes. The Agency plan is designed for multiple domains, larger mailbox capacity, team permissions, admin tools, API access, and higher-scale operations.
Launch, Growth, and Professional each begin with a 7-day free demo and 100 credits after the subscription is authorized. The first monthly charge occurs after day 7, and the selected plan then renews automatically every month until you cancel it from Billing. Cancel before the demo ends to avoid the first charge.
Start building healthier sending
Your next campaign should not begin with guesswork.
Connect your infrastructure, follow a guided setup, warm up gradually, and understand your reputation before you scale.