Email infrastructure for modern teams

Email infrastructure,
at any scale.

SMTP relay, REST API, dedicated IPs and signed webhooks — the deliverability stack behind millions of sends, production-ready from day one.

Start Sending View Pricing

Free plan included · No card required · Crypto + UPI billing

0+emails delivered today

0.00%uptime SLA

0+teams onboard

SPF · DKIM · DMARCGDPR + DPDP readySigned webhooks

Campaign performance

Acme Inc · Production

Live

Emails sent · this week

2.41M

12.8%

MonTueWedThuFriSatSun

Delivered

99.4%

Opened

41.2%

Clicked

12.7%

Trusted by ambitious teams shipping millions of emails

Web3LabsTechNovaCryptoXSaaSifyDevCoreNexusAcmeLatitudeAuroraTesseraKobaltVertex

Platform

Everything you need.
Nothing you don't.

Four primitives that handle 99% of what production email systems need — without the per-feature pricing traps of the incumbents.

SMTP relay

Drop-in replacement for any existing SMTP server. Same credentials, better deliverability, signed webhooks back.

REST API

A single POST sends transactional email at scale. SDKs for Node, Python, Go, Ruby, PHP. Type-safe everywhere.

Real-time analytics

Opens, clicks, bounces, complaints — streamed live, queryable per campaign, domain, and IP pool.

Inbox-grade deliverability

SPF, DKIM, DMARC handled at onboarding. Dedicated IP pools, automatic warmup, complaint handling.

Beautiful templates

Production-ready layouts for every flow. Visual editor, AI-prompted generation, or hand-coded MJML.

Enterprise security

HMAC-signed webhooks, scoped API keys, audit log, 2FA, GDPR + DPDP compliant. SOC 2 in progress.

How it works

From signup to first send. Four steps.

No 6-week onboarding. No sales call required.

Step 01

Verify your domain

Drop SPF · DKIM · DMARC into your DNS. We monitor every 24h and alert on drift. Most teams ship in under 10 minutes.

acme.com

Verified

SPF

DKIM

DMARC

Re-checks every 24h · zero-config TLS · ARC-Authentication-Results headers

How it works

From signup to first send. Four steps.

Step 01

Verify your domain

Drop SPF · DKIM · DMARC into your DNS. We monitor every 24h and alert on drift. Most teams ship in under 10 minutes.

Step 02

Compose your first send

Drag-and-drop editor, paste HTML, or describe it in plain English — our AI composes a production-ready template you can save and reuse.

Step 03

Send at any scale

REST API, SMTP relay, or scheduled blasts. Dedicated IP pools for marketing vs transactional. Automatic warmup, complaint handling, bounce parsing.

Step 04

Track every event

Real-time opens, clicks, bounces, complaints — streamed to the dashboard and pushed to your webhook endpoint with HMAC-SHA256.

Start the 10-minute setup

Deliverability

Inbox-grade, by default.

SPF, DKIM, DMARC configured at onboarding and monitored every 24h. Dedicated IP pools keep marketing blasts from poisoning your password-reset reputation.

acme.com

Verified

SPF
Sender authorized to send from acme.com
DKIM
Cryptographic signature verifies content
DMARC
Alignment + reporting policy enforced

We re-check every 24h and alert you if your DNS drifts — no silent deliverability cliffs.

Inbox placement

last 7 days

98.6%

▲ 2.4pp

delivered to primary inbox

Primary inbox98.6%

Promotions tab1.1%

Spam0.3%

Dedicated IP pools available at Scale tier — transactional vs marketing isolation included.

Analytics

Every send, measured.

Opens, clicks, bounces, complaints — streamed live, per campaign, per domain, per IP pool. Catch issues before they hurt your sender reputation.

Emails sent today

0

Delivery rate

0.0%

0%100%

API requests / sec

0

Webhooks fired

0

Templates

A gallery built for real inboxes.

Production-ready layouts for every flow — fully editable in the visual studio, generated from prompts by our AI, or hand-coded in MJML / HTML.

[email protected]9:24 AM

You're in. Let's set you up.

Get the most out of your free trial in 5 minutes

Welcome aboard, Priya.

Open dashboard

Preview

Welcome flow

Onboarding

[email protected]9:24 AM

Receipt for order #1042 · ₹2,489

Paid via UPI · expected delivery May 18

Thanks for your order, Priya.

View invoice

Preview

Order receipt

Transactional

[email protected]9:24 AM

Meet the v2 release.

Automations, AI templates, dedicated IPs — and more

v2 is live.

See what's new

Preview

Product launch

Marketing

[email protected]9:24 AM

We miss you, Arjun.

It has been a while — here is what you have missed

Pick up where you left off.

Resume your trial

Preview

Re-engagement

Lifecycle

[email protected]9:24 AM

Reset your password

Link valid for 30 minutes

Reset your password.

Choose a new password

Preview

Password reset

Security

[email protected]9:24 AM

Your week on Sendr365

482K sent · 99.4% delivered · 38.7% opened

Your week in numbers.

Open full report

Preview

Weekly digest

Notification

Browse all templates…or describe one in plain English and let AI build it

Developers

Built for engineers.

REST, SMTP, and signed webhooks. SDKs for Node, Python, Go, Ruby, PHP. SendGrid & Mailgun-compatible endpoints — migration is an env-var change.

send-email.shlive

1curl -X POST https://api.sendr365.com/v1/email \

2 -H "Authorization: Bearer $SENDR_API_KEY" \

3 -H "Content-Type: application/json" \

4 -d '{

5 "from": "[email protected]",

6 "to": "[email protected]",

7 "subject": "Welcome aboard",

8 "html": "<p>Thanks for signing up!</p>"

9 }'

200 OK

42ms

{
"id": "eml_8x4Tq9...",
"status": "queued"
}

Webhook stream

last 4 events

email.delivered[email protected]+240ms

email.opened[email protected]+18.4s

email.clicked[email protected]+23.9s

email.delivered[email protected]+198ms

Node · Python · Go · Ruby · PHP SDKs SMTP relay drop-in for any stack HMAC-signed event webhooks

Customers

Trusted in production.

From private beta. Roles and companies confirmed; names withheld until case studies clear for publication.

“Migrated 1.2M monthly sends from SendGrid in a weekend. The SMTP relay was a literal drop-in — same env vars, better deliverability dashboards.”

Engineering lead

Series A SaaS · 50-person team

“Crypto billing was the unlock for us. We pay in USDT, no card hassles, and the credit packs match our spiky launch volumes much better than monthly tiers.”

Founder

Web3 commerce · Singapore

“Signed webhooks + HMAC verification out of the box meant our security review took an hour instead of a week. The deliverability tooling caught a DKIM misalignment our prior ESP had hidden.”

CTO

Fintech · India

FAQ

Questions, answered.

Most teams ship the first production email in under 10 minutes: verify your domain (we generate SPF/DKIM/DMARC records you paste into your DNS), drop our SMTP credentials or API key into your app, and send. Verification typically completes in a few minutes once DNS propagates.

Email infrastructure,
at any scale.

Everything you need.
Nothing you don't.

SMTP relay

REST API

Real-time analytics

Inbox-grade deliverability

Beautiful templates

Enterprise security

From signup to first send. Four steps.

Verify your domain

From signup to first send. Four steps.

Verify your domain

Compose your first send

Send at any scale

Track every event

Inbox-grade, by default.

Every send, measured.

A gallery built for real inboxes.

Built for engineers.

Simple pricing. No hidden fees.

Trusted in production.

Questions, answered.

Ship your first email in minutes.

Email infrastructure, at any scale.

Everything you need. Nothing you don't.

SMTP relay

REST API

Real-time analytics

Inbox-grade deliverability

Beautiful templates

Enterprise security

From signup to first send. Four steps.

Verify your domain

From signup to first send. Four steps.

Verify your domain

Compose your first send

Send at any scale

Track every event

Inbox-grade, by default.

Every send, measured.

A gallery built for real inboxes.

Built for engineers.

Simple pricing. No hidden fees.

Trusted in production.

Questions, answered.

Ship your first email in minutes.

Email infrastructure,
at any scale.

Everything you need.
Nothing you don't.