New guide: how to warm up a dedicated IP without hurting your reputation. Read now →
Log in
MigoSMTP
Book a demo Start free
Email infrastructure for builders

Email delivery you can trust, at any scale.

Send transactional and marketing email over SMTP or API, with authentication, warmup, reputation monitoring and analytics built into one platform.

[Free plan details: add monthly email allowance]

smtp.migosmtp.com:587
> EHLO app.example.com
< 250-STARTTLS · 250 AUTH
> AUTH PLAIN ••••••••
< 235 Authentication successful
Authenticated
TLS secured
Key accepted
Your app signs in over SMTPThe app opens a TLS connection, announces itself and authenticates with a scoped key. Nothing is accepted until the key is verified.
SPFSending IP is authorised
PASS
DKIMSignature is valid
PASS
DMARCPolicy aligned
PASS
All three aligned with your From domain
Aligned
Signed
Security checks run firstSPF proves the IP may send, DKIM proves the message was not altered, and DMARC checks both line up with your From domain.
Your app
Gmail, Outlook
QueuePriority first
IP poolWarm IPs
ProviderPaced send
Accepted by the receiving server
Paced per provider
Warm IP
Queued, paced, routedMessages enter a priority queue, pick a warm IP from the right pool, and are paced to each mailbox provider's limits.
Inbox
Primary
Promotions
Updates
1 new
Acme Team
Welcome aboard
now
Billing
Your receipt is ready
2h
Team updates
Weekly summary
1d
Support
We have your request
2d
Primary tab
Not spam
It lands in the inboxWith authentication and a healthy reputation behind it, the message arrives in the primary tab, not in spam.
Mail
A
Welcome aboardFrom Acme Team
Hi Priya, your account is ready.
Verify your email to get started.
Reply here if you need help.
Read
Important
Opened
Starred
The customer reads itThe recipient opens the email and stars it as important. Those positive signals feed back into your sender reputation.
MigoSMTP copilot
AI
Why did Gmail defer some mail today?
get_events(provider=gmail) → [n] deferrals
read_headers(msg_a41b) → 421 rate limit
Gmail throttled one IP after a burst.
Pacing is lowered; it should clear shortly.
Event log
Provider rules
Plain-language answers
Cites its sources
Ask your sending data anythingThe copilot reads your events and logs through scoped tools, then explains what happened in plain language. It cites the records behind every answer so you can verify it.
Authenticate
Verify sender
Route
Inbox
Engagement
AI copilot
Delivery overviewIllustrative sample data
Delivered
—
Bounced
—
Deferred
—
SPF pass DKIM pass DMARC aligned Warmup day 9 of 21
SMTP relayREST APIWebhooksDedicated IPsDKIM signingInbound parseTemplatesAnalyticsSuppression listsReputation monitoringEmail validationTeam roles and audit logSMTP relayREST APIWebhooksDedicated IPsDKIM signingInbound parseTemplatesAnalyticsSuppression listsReputation monitoringEmail validationTeam roles and audit log
The platform

Everything between your app and the inbox

Start with the relay or API, then add the tools that keep your mail out of the spam folder.

SMTP Relay

Connect any app or CMS with standard SMTP, TLS and per-account limits.

Learn more →

Email API

Send, template and track email from your own code over REST.

Learn more →

Email Validation

Verify addresses before sending and keep bounces low.

Learn more →

Dedicated IPs & Warmup

Your own IPs with guided warmup plans and shared-pool fallback.

Learn more →
See it in action

One platform from first send to inbox

Switch between stages to see what you control at each step. Illustrative interface with sample data.

app.migosmtp.com / sendSample data
Queued
[n]
Sent
[n]
Rate
[n/s]
acceptedmessage to you@example.com
acceptedmessage to team@example.com
queuedbatch of [n] recipients
acceptedmessage to ops@example.com
Deliverability, built in

Reputation is a feature, not an afterthought

We guide every domain through authentication, ramp new IPs on a schedule and watch your reputation so problems surface early.

  • Guided DKIM, SPF and DMARC setup with live record checks
  • Dedicated IPs with automated warmup schedules
  • Reputation and blocklist monitoring with alerts
  • Automatic suppression of bounces and complaints
  • Per-provider insight into deferrals and bounces
Explore the deliverability hub →
Sending domains · sample
mail.example.com SPFDKIMDMARC
news.example.com SPFDKIMDMARC
billing.example.com SPFDKIMDMARC
promo.example.com SPFDKIMDMARC
IP warmup progressDay 9 of 21
For developers

Send your first email in a few lines

A clean REST API, plain SMTP for everything else, and webhooks for every event along the way.

curl https://api.migosmtp.com/v1/send \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "hello@yourdomain.com",
    "to": "user@example.com",
    "subject": "Welcome aboard",
    "html": "<p>Your account is ready.</p>"
  }'

Sample request. Replace the placeholders with your own key and verified sender.

How a message travels

From your app to the inbox, with checks at every hop

Your appSends by SMTP or API with your key.
IntakeAuthenticates, validates and rate-checks the request.
Queue and routingPrioritises mail and picks the right IP pool.
Signing and deliverySigns with DKIM and delivers with provider-aware pacing.
Inbox and eventsDelivery, bounce and engagement events flow back to you.
Built for teams

Operate email like infrastructure

Analytics and logs

Searchable message logs and delivery, bounce and engagement reports.

Webhooks and events

Signed events for delivery, bounce, open, click and complaint.

Templates

Versioned templates with variables, previews and test sends.

Teams and workspaces

Roles, workspaces and single sign-on for larger organisations.

Audit log

A record of who changed keys, domains, limits and settings.

Live status

Public status page and incident history you can subscribe to.

Proof, in the numbers that matter

[00]
Emails sent each month
[00]
Average API response time
[00]
Active sending domains
[00]
Uptime over the last 12 months
[Customer quote: add an approved testimonial about deliverability]
[Name, title, company]
[Customer quote: add an approved testimonial about migrating to MigoSMTP]
[Name, title, company]
Switching providers

Moving from another sender? We will help you migrate.

Step-by-step guides cover DNS, API changes, suppression lists and a safe cutover plan.

From SendGrid→From Mailgun→From Amazon SES→From Postmark→

Learn from the field

All resources →
GuideDKIM, SPF and DMARC: a practical setup guideAuthenticate your domain the right way the first time. GuideHow to warm up a new dedicated IPA day-by-day ramp that mailbox providers trust. GuideGmail and Yahoo bulk sender rules, explainedWhat changed, and what your setup needs to show.

Start sending in minutes.

Create an account, add your domain and send your first email.