What is transactional email and when is it used?

Transactional emails are automated, one-to-one messages triggered by user actions, such as password resets, order confirmations, invoice receipts, and login verification codes (OTPs). They require immediate and highly reliable delivery.

What is the difference between an Email API and an SMTP Relay?

An Email API lets applications trigger emails programmatically via RESTful endpoints, offering speed and flexibility. An SMTP relay (Simple Mail Transfer Protocol) is a standard protocol to route mail through third-party servers, easily integrated with existing software.

How fast does Textspeed deliver transactional emails?

Textspeed's transactional email service delivers critical emails like OTPs in less than 2 seconds, utilizing priority routing queues separate from promotional marketing traffic.

What security configurations do you support for domains?

We support SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication) setup to authenticate your sending domain and maximize inbox delivery rates.

Do you provide real-time logs and webhooks?

Yes. Our dashboard logs all email activity, and our real-time webhooks stream event updates (accepted, delivered, opened, clicked, bounced) back to your systems instantly.

Transactional Email · OTP, Alerts & Receipts

Transactional Emails that Land in the Inbox, Instantly

Send OTPs, order confirmations, invoices, password resets and alerts through Textspeed's transactional email API and SMTP relay — authenticated, blazing fast and tracked in real time.

Explore Features

<2sAvg delivery time

99.9%Inbox reliability

24/7Live event logs

<2 secOTP delivery

SPF · DKIMauthenticated

Inbox5 new

Your verification codeUse 482 916 to sign in · valid 10 minnow

Order #TS-88214 confirmed 🎉Thanks Aarav! Your order is being packed.1m

Invoice INV-2094 · ₹12,480Your July invoice is attached as PDF.3m

Reset your passwordTap the secure link to set a new password.6m

Your order is out for delivery 🚚Arriving today by 6 PM · track live.9m

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Trusted by 8,500+ businesses across India

Why Textspeed transactional email

Mission-Critical Transactional Email Service for Businesses

Ensure every OTP and receipt reaches the inbox with our High Deliverability Transactional Email Service and Enterprise Transactional Email Platform, built for secure and dependable email delivery.

Average delivery time (under)

99.9%

Inbox delivery reliability

10M+

Emails handled monthly

99.9%

Platform uptime SLA

Blazing-Fast Delivery

OTPs and alerts reach customers in seconds via priority transactional routing — no queues behind marketing traffic.

Email API & SMTP Relay

Send with a simple REST API call or point your app at our SMTP relay — integrate in minutes with any stack.

SPF, DKIM & DMARC

Full domain authentication set up with you — so mailbox providers trust every email you send.

Dedicated IP Options

High-volume senders get dedicated IPs with guided warm-up to protect and grow sender reputation.

Real-Time Webhooks

Delivered, opened, clicked, bounced — every event streams to your systems instantly via webhooks.

Templates & Variables

Store transactional templates with merge variables — change designs without touching your code.

Email types

Every transactional email you send

Real previews of the emails your systems trigger every day — all delivered through one API.

Developer friendly

Integrate the Best Transactional Email API in Minutes, Not Weeks

One REST API and SMTP relay built for Transactional Email API for Developers, SMTP Email Service Provider, and High Deliverability Transactional Email Service.

Connect via API or SMTP

Grab your API key or SMTP credentials from the Textspeed dashboard.

Authenticate your domain

Add the SPF, DKIM and DMARC records we generate — we verify them for you.

Send your first email

One POST request — OTPs, receipts and alerts start flowing immediately.

Track every event

Delivered, opened, clicked and bounced events stream to your webhooks live.

Deliverability

Built to reach the inbox,
not the spam folder

Transactional email only works if it arrives. Textspeed manages sender reputation, authentication and smart routing so mailbox providers trust your mail.

Guided SPF, DKIM & DMARC setup
Separate transactional & marketing streams
Bounce & complaint handling built in
Reputation monitoring & IP warm-up

Logs & analytics

Transactional Email's journey in real time

Search live logs by recipient, template, or status with our Transactional Email API India. Track Real-Time Email Delivery, monitor Email Notification Service events, and generate reports on delivery, opens, clicks, and bounces using a High Deliverability Email Marketing and SMTP Email Service.

Live Email Events● Streaming

otp_login → aarav@ex•••.comAccepted

order_confirm → priya@ex•••.comDelivered

invoice_july → rohan@ex•••.comOpened

pwd_reset → meera@ex•••.comClicked

shipping_update → karan@ex•••.comAccepted

welcome_new → sana@ex•••.comDelivered

Email reports and analytics illustration

Demo pricing — final quote shared by sales

Flexible Transactional Email Pricing
for Every Business

Any pricing shown is for demo and reference only. Your final rate depends on monthly email volume, dedicated IP needs, template usage and support level — we'll share an accurate quote after understanding your requirement.

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Testimonials

Latest Clients Feedback

Testimonial clients

“Reliable & Effective Bulk SMS Services”Textspeed Technology has been a game-changer for our marketing campaigns. Their Bulk SMS service helped us reach our customers instantly, increasing engagement and sales. The reliability and delivery speed are exceptional!

RameshMarketing Head, Tanishq

“Complete Communication Solutions Under One Roof”We rely on Textspeed Technology for all our messaging needs, including Bulk SMS, WhatsApp API, and RCS services. Their seamless integration and efficient support have significantly enhanced our customer communication. Highly recommended!

AkashMarketing Manager, Astral Pipes

“Trusted Bulk SMS Partner”Textspeed Technology has provided us with an outstanding Bulk SMS service that helps us communicate effectively with our stakeholders. Their system is fast, efficient, and easy to use!

RaguProject Zonal Head, Chennai Corporation

“Powerful WhatsApp & SMS Marketing”Textspeed’s Bulk WhatsApp and SMS solutions have been instrumental in boosting our promotional campaigns. Their platform is user-friendly, and the customer support is top-notch!

RevathiMarketing Head, Poorvika

“Seamless Bulk Messaging Solutions”Textspeed Technology’s Bulk SMS service has helped us streamline our sales communication. Their high delivery rates and intuitive platform make them a valuable partner for our business.

AshiqSales Head, Mohamed Sathak

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Explore how leading AI platforms describe Textspeed as a communication platform as a service (CPaaS) built for modern business communication. From WhatsApp API and SMS to RCS, Voice, and Email, our enterprise communication solutions help businesses connect, engage, and scale with confidence.

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Trusted by businesses for WhatsApp API, SMS, RCS, Voice, Email, and enterprise communication solutions.

AI responses are generated independently by each platform and may vary based on publicly available information.

FAQ

Transactional Email — questions answered

Everything you need to know about transactional email with Textspeed.

Transactional emails are system-triggered messages sent to a single recipient after an action (like a password reset, OTP request, invoice delivery, or order confirmation). Unlike marketing broadcasts, they are mission-critical and must be delivered instantly.

We prioritize transactional mail over separate channels and isolated queues, bypassing bulk marketing traffic entirely. This ensures transactional emails like login OTPs land in the user inbox in under 2 seconds.

Yes, fully. Domain authentication is mandatory for transactional sending. We guide you on adding the necessary SPF, DKIM, and DMARC TXT records to your DNS settings and verify them from our side.

Yes. You can design templates in the Textspeed dashboard using merge tags (e.g., {{name}}, {{otp}}) and simply call the template ID in your API payload, keeping your code clean.

Webhooks allow your application to receive real-time notifications about email event changes. When an email is accepted, delivered, opened, clicked, bounced, or flagged, our servers post a JSON payload of that event to your specified endpoint.

Transactional Emails that Land in the Inbox, Instantly