Node.js 
Python 
PHP 
C# 3,000 emailsEvery month
Transactional
Cold email & newsletter
Tools
See your emails land in the inbox, not spam
Free deliverability monitoring on every plan
Free warm-up inbox included
Free Email API & SMTP . 3,000 emails/month.
An Email API and SMTP service for transactional, cold, newsletter, and marketing email. Dedicated IPs and delivery monitoring included. Free up to 3,000 emails/month.
Your free plan, every month
2,734
of 3,000 emails sent
Delivered
2,675
Bounced
59
Available
266
What you get
Everything you need to land in the inbox .
Real inboxes7 days free
Warm-up included
Stop landing in spam.
Real inboxes on Google, Microsoft, Yahoo and more read your emails and pull them out of spam.
See how it works2 IPsBounce tracking
Cold & newsletter
Built to send cold email.
Automatic warm-up and real-time bounce tracking, so outreach and newsletters actually land.
Start sending free100 free12 checks
Email validation
100 free validations.
Catch invalid, risky and disposable addresses before they hurt your reputation.
Validate for freeFor developers
Start sending
in minutes.
Simple API and SDKs for every language. Drop into your stack and send your first email in under 5 minutes.
index.js
const axios = require('axios');
const response = await axios.post(
'https://mail.sendcorex.com/v3.0/send',
{
to: 'customer@example.com',
subject: 'Welcome!',
body: '<h1>You are in.</h1>',
from: 'hello@yourdomain.com',
senderName: 'Your Company',
},
{
headers: {
'Authorization': 'YOUR_API_KEY',
'Content-Type': 'application/json',
},
}
);
console.log('Sent:', response.data);Compare
Included in every plan.
Others charge extra.
Fallback protection
Included
Not available elsewhere
Contacts
Unlimited
Up to $299/mo by tier
Domains
Unlimited
$5–$29 per domain
Team seats
Unlimited
$8–$25 per seat/mo
Webhooks
Unlimited
Locked to paid plans
Sender identities
Unlimited
1–3 on free tier
Email templates
1,800+
Capped at 3–250
IPs
2× every plan
$30+ per IP add-on
Based on publicly available plans, 2026. "Others" = industry average across major ESP providers.
Pricing
Simple, transparent pricing.
No feature gating. No surprise bills. Cancel any time.
Emails per month
Free
Try the platform
$0/mo
3,000 emails/mo
Start for free- 3,000 emails/month
- Unlimited contacts
- 2 Shared IPs
- SMTP & Email API
- Unlimited domains
- Unlimited senders
- Unlimited webhooks
- Unlimited team seats
- API Key with scopes
- Unlimited list management
- Real-time analytics
- IP warm-up tool
- 24/7 technical support
Basic
Startups & small teams
$11.99/mo
25,000 emails/mo
Get started- 25,000 emails/month
- Unlimited contacts
- 2 Shared IPs
- SMTP & Email API
- Unlimited domains
- Unlimited senders
- Unlimited webhooks
- Unlimited team seats
- API Key with scopes
- Unlimited list management
- Real-time analytics
- IP warm-up tool
- 24/7 technical support
- Basic Fallback
Business
Growing businesses
$51.99/mo
200,000 emails/mo
Get started- 200,000 emails/month
- Unlimited contacts
- 2 Shared IPs
- SMTP & Email API
- Unlimited domains
- Unlimited senders
- Unlimited webhooks
- Unlimited team seats
- API Key with scopes
- Unlimited list management
- Real-time analytics
- IP warm-up tool
- 24/7 technical support
- Advanced Fallback
Enterprise
Scale without limits
Custom
Custom volume
Talk to sales- -1 emails/month
- Unlimited contacts
- 4 Dedicated IPv4 + 1 IPv6
- SMTP & Email API
- Unlimited domains
- Unlimited senders
- Unlimited webhooks
- Unlimited team seats
- API Key with scopes
- Unlimited list management
- Real-time analytics
- IP warm-up tool
- 24/7 technical support
- Enterprise Fallback
Customer reviews
Trusted by teams worldwide.
Teams worldwide rely on SendCorex to deliver every email on time.
4.5
Every time I thought it would be great if it could do this, Sendcorex already did. Exactly what we need for our critical B2B communications.
R
R. E.CTO
I just threw the documentation into Cursor and it worked flawlessly. Stands out with a perfect set of features other services charge way more for.
K
K. H.Product Manager
Far easier to set up than complex cloud providers. The visibility our team needs without compromising infrastructure, our devs are happy.
T
T. M.CTO
Switching was very quick and the UI is super fast. Always working, and I am not missing anything from our old tool.
S
S. B.Principal Analyst
Prior to Sendcorex, email infrastructure was a world of pain. It has certainly made things a lot easier for our teams.
A
A. C.Chief Digital Officer
Switched from Postmark for sending around 1M emails per month. Cheaper and better stats. The team helped me improve open and bounce rates.
A
A. A.Founder
After years of web development, I only just started using Sendcorex. The API is clean, the docs are great, and it just works out of the box.
D
D. M.Full Stack Developer
Just signed up and I am loving it. So easy to set up. The free plan gives you access to everything, no hidden limits.
J
J. A.Backend Developer
Support is genuinely fast and helpful. Had an issue at 2am and got a response within minutes. That kind of support is rare.
R
R. G.Senior Engineer
The SMTP setup took less than 5 minutes. Copy-paste the config, done. Pricing is very attractive compared to the big players.
J
J. L.DevOps Engineer
Having two separate IPs for marketing and transactional is genuinely useful. Promotional emails never affect password reset delivery. Simple thing but makes a real difference.
F
F. O.Infrastructure Engineer
Honestly forgot what a blacklist even was since moving over. Fallback just handles it quietly in the background. Set it up once and never thought about it again.
M
M. V.Startup Founder
They keep shipping updates which is good but I did prefer the old dashboard layout. This one has more features for sure just takes some getting used to.
P
P. N.Engineering Manager
Webhooks work exactly as documented. Bounces, opens, clicks all coming through clean. Saved us from building our own tracking layer.
C
C. W.Backend Developer
We send about 200k emails a month and deliverability has been consistently solid. Had one hiccup early on and support sorted it same day.
B
B. T.CTO
The segmentation is good enough for what we need. Not as deep as a dedicated marketing platform but for a tool that also handles transactional it is more than enough.
L
L. R.Growth Lead
Warm up was automatic, no manual config needed. First campaign went out without any issues. That alone was worth switching.
H
H. K.SRE
Real time delivery logs are actually real time. Not 5 minute delayed like the last provider we used. Makes debugging so much faster.
N
N. S.Product Engineer
Every time I thought it would be great if it could do this, Sendcorex already did. Exactly what we need for our critical B2B communications.
R
R. E.CTO
I just threw the documentation into Cursor and it worked flawlessly. Stands out with a perfect set of features other services charge way more for.
K
K. H.Product Manager
Far easier to set up than complex cloud providers. The visibility our team needs without compromising infrastructure, our devs are happy.
T
T. M.CTO
Switching was very quick and the UI is super fast. Always working, and I am not missing anything from our old tool.
S
S. B.Principal Analyst
Prior to Sendcorex, email infrastructure was a world of pain. It has certainly made things a lot easier for our teams.
A
A. C.Chief Digital Officer
Switched from Postmark for sending around 1M emails per month. Cheaper and better stats. The team helped me improve open and bounce rates.
A
A. A.Founder
After years of web development, I only just started using Sendcorex. The API is clean, the docs are great, and it just works out of the box.
D
D. M.Full Stack Developer
Just signed up and I am loving it. So easy to set up. The free plan gives you access to everything, no hidden limits.
J
J. A.Backend Developer
Support is genuinely fast and helpful. Had an issue at 2am and got a response within minutes. That kind of support is rare.
R
R. G.Senior Engineer
The SMTP setup took less than 5 minutes. Copy-paste the config, done. Pricing is very attractive compared to the big players.
J
J. L.DevOps Engineer
Having two separate IPs for marketing and transactional is genuinely useful. Promotional emails never affect password reset delivery. Simple thing but makes a real difference.
F
F. O.Infrastructure Engineer
Honestly forgot what a blacklist even was since moving over. Fallback just handles it quietly in the background. Set it up once and never thought about it again.
M
M. V.Startup Founder
They keep shipping updates which is good but I did prefer the old dashboard layout. This one has more features for sure just takes some getting used to.
P
P. N.Engineering Manager
Webhooks work exactly as documented. Bounces, opens, clicks all coming through clean. Saved us from building our own tracking layer.
C
C. W.Backend Developer
We send about 200k emails a month and deliverability has been consistently solid. Had one hiccup early on and support sorted it same day.
B
B. T.CTO
The segmentation is good enough for what we need. Not as deep as a dedicated marketing platform but for a tool that also handles transactional it is more than enough.
L
L. R.Growth Lead
Warm up was automatic, no manual config needed. First campaign went out without any issues. That alone was worth switching.
H
H. K.SRE
Real time delivery logs are actually real time. Not 5 minute delayed like the last provider we used. Makes debugging so much faster.
N
N. S.Product Engineer
Support
How can we help?
Find answers to common questions about Sendcorex — or get in touch with our team.
Sendcorex is an email infrastructure platform offering SMTP relay, REST Email API, and Marketing Campaigns. It helps businesses send transactional and marketing emails with built-in deliverability tools — warm-up, dedicated IPs, webhooks, and real-time analytics.
3,000 emails per month, forever free. You get full access to SMTP, the Email API, shared IPs, and real-time analytics on the free tier. Upgrade any time as your volume grows.
Three core products: SMTP Relay for drop-in email sending with any library, Email API (REST) for programmatic sends from any language, and Marketing Campaigns with a drag & drop editor, 1,800+ templates, segmentation, and analytics.
Visit the Pricing page at any time and choose a plan. Upgrades take effect immediately. You can also downgrade or cancel from the billing settings in your dashboard.
Email us at hi.core@sendcorex.com, use the live chat in the dashboard, or reach out via WhatsApp. For urgent issues, chat is the fastest path.
Yes. Add and verify your domain in Settings → Domains. You'll add DNS records (SPF, DKIM, DMARC) and Sendcorex will verify them. Unlimited domains are included on every plan.
Warm-up gradually increases your sending volume over 14 days, building a positive reputation with Gmail, Outlook, and others. Sendcorex handles warm-up automatically — no configuration needed.
Every account gets 2 shared IPs — one for transactional email, one for marketing. This keeps your transactional reputation clean regardless of campaign volume. Additional IPs are available on paid plans.
Our fallback system detects the failure and reroutes through a backup path in under 2 seconds. Your recipients never see a failed delivery and you get notified via webhook.
Official SDKs for Node.js, PHP, Python, Java, C#, Ruby, and Go. You can also call the REST API directly from any language, or connect via SMTP using any library that supports it — Nodemailer, PHPMailer, smtplib, MailKit, JavaMail, and more.
Port 587 with STARTTLS (recommended) and port 465 with SSL. Both work on all plans including free. Your API key is used as both the username and password.
Register a HTTPS endpoint in the dashboard and Sendcorex will POST a JSON payload for every event — opens, clicks, bounces, complaints, and unsubscribes — in real time. Webhooks are available on all plans.
Our team provides free migration assistance. We'll help move your templates and contacts, configure your DNS records, and warm up your IPs — with zero downtime.
The dashboard shows real-time analytics for every send: open rate, click rate, bounce rate, unsubscribes, and conversions. For campaigns, you also get click maps and A/B test results.
Still have questions?
Can't find what you're looking for? Our support team is here to help.