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 * Pricing
 * Solutions
   * Deliverability
   * SMTP for developers
   * SMTP for marketers
   * SMTP for startups and students
   * Delivery services
   * Why SMTP
 * Transactional Email
 * Email API
 * Resources
   * API Documentation
   * Resource Center
   * Integrations
   * Email Deliverability Blog
 * Login
 * Sign Up

SMTP.com

 * Pricing
 * Solutions
   * Deliverability
   * SMTP for developers
   * SMTP for marketers
   * SMTP for startups and students
   * Delivery services
   * Why SMTP
 * Transactional Email
 * Email API
 * Resources
   * API Documentation
   * Resource Center
   * Integrations
   * Email Deliverability Blog
 * Login
 * Sign Up



> TRANSACTIONAL AND EMAIL RELAY API


RELIABLE SMTP RELAY AND EMAIL DELIVERY SERVICES.

Powerful email delivery services that enable you to send and track high volume
emails effortlessly. Integrate and start sending in minutes.

 * See pricing
 * High volume plans



TRUSTED BY 100,000+ BUSINESSES


SMTP IS THE TRUSTED TRANSACTIONAL AND EMAIL RELAY PROVIDER FOR THOUSANDS OF
BUSINESSES.



> SERVICES


YOUR EMAIL DELIVERY SUITE

All your transactional, email relay and email delivery needs under one roof.
Whether you need a low-latency email delivery provider for your transactional
emails, scalable infrastructure for high-volume sends or reliable backend
solution for your marketing campaigns, SMTP is built to deliver.


SMTP REPUTATION DEFENDER

Reputation Defender is SMTP’s proprietary technology that uses big data to
proactively monitor your email list health and safeguard your domain and IP
reputation among ISPs by suppressing bad emails in your sends from hard and soft
bounces. This ensures your delivery rates and inbox placement incrementally gets
better over time.

 * Detailed reporting
 * Proactive monitoring
 * No integration needed

REPUTATION DEFENDER IS AN OPTIONAL ADDON ON ALL SMTP PLANS.

See plans



EMAIL RELAY API

Ridiculously easy to integrate and develop on top of, the SMTP email relay API
was crafted with simplicity in mind. Highly flexible and with detailed
documentation, our API is a developer's friend.

Explore


MANAGED DELIVER SERVICES

Get deliverability help and managed services from a group of in-house experts
who are email veterans. From on-going account management, delivery consulting to
managed integration.

Explore


EMAIL LIST VALIDATION

Use the same infrastructure that ensures SMTP remains the industry leader in
email deliverability. Maintain a clean email list by validating and removing bad
emails from it. Currently available on request.

Request access

> UNMATCHED DELIVERABILITY


ENGINEERED FOR RELIABLE DELIVERY AT SCALE.

Flexible and scalable email sending service built for businesses and developers
alike.

Start sending

— OVER 22 YEARS OF EMAIL DELIVERY SUCCESS

Delivery rate 98%
Uptime 99%
SMTP.com is known among ISPs as on the of the most reliable and trusted senders
on the internet.

ISP RELATIONS

SMTP maintains impeccable reputation among mailbox providers by proactively
vetting out spam and maintaining high delivery rates.

SUPER FAST DELIVERY

Our highly responsive infrastructure ensures virtually no latency and over 99%
system uptime. When speed of email sending matters, SMTP delivers.

OPTIMIZED SENDING

Our email relay infrastructure has evolved with changing ISP protocols and
benchmarks. With over 20 years of incremental development, SMTP offers a highly
optimized email delivery engine.


WHY CHOOSE SMTP?

SMTP gets your emails in front of your audience’s eyes. Supercharge your high
volume campaigns, transactional emails and marketing platform with SMTP’s
superior inbox delivery.

SCALABLE INFRASTRUCTURE

Whether you send billions of emails a month or it is the speed of delivery that
matters, SMTP scales effortlessly.

INDUSTRY-LEADING DELIVERY

For over two decades, businesses rely on our unmatched deliverability rates and
reputation among mailbox providers.

IN-HOUSE SUPPORT

Our in-house support team are experienced email delivery experts with decades of
expertise.




> TRANSACTIONAL EMAILS


SEND TRANSACTIONAL EMAILS WITH JUST A FEW LINES OF CODE.

Keep your customers up-to-date by sending automated emails, such as purchase
confirmations, shipping notifications, order status updates, and policy change
notices.
 
Start integrating
Authentication
API Key
DKIM

URL:  https://api:{apikey}@api.smtp.com/v4

Header: Authorization:   Basic base64(api:{apikey})

Bearer Token Header:    Authorization: Bearer {apikey}

Custom HTTP Header:   X-SMTPCOM-API: {apikey}

Query String: https://api.smtp.com/v4?api_key={apikey}

APIKey   {

status     // string  – Current status of the API key

description    // string – Description for API key

key    //string – The actual API key value

date_created     // string – timestamp of when API key was created. }

CreateDkimKey  {

        status     //     string – Request status.

       data    {    //   description: Domains

       dkim_key   //  string – request result

} }



NOTIFICATIONS

Send follow up emails in sync with web or mobile service notifications.

REGISTRATION EMAILS

Increase sign ups by reducing opt in confirmation latency and improve onboarding
metrics.

AUTHENTICATION EMAILS

Keep users safe by sending authentication emails into inboxes on time.

ORDER CONFIRMATIONS

Build brand value and credibility by sending order and billing details on time.

STATUS UPDATES

Bring users back by sending on-time status updates on their account and product
usage.

POLICY CHANGE EMAILS

Ensure critical policy change information emails get in front of your users.



> EMAIL RELAY API


FAST SETUP, EASY INTEGRATION. POWERFUL API.

Get up and running today. We incredibly easy-to-use API and comprehensive
documentation means you can spend less time integrating and more time growing
your business.

Get started
View API documentation

ACTIVATE ACCOUNT

After you sign up, check your email, click a the verification link and you’re
done.

DOMAIN SETUP

Add DNS records, setup DKIM & SPF so we know you own the domain you are sending
from.

START SENDING

Deploy the code where email fits into your product or website, or plug your SMTP
credentials into a tool of your choice.



EASY IMPLEMENTATION

Easy and straightforward SMTP integration provided by a simple Web API on
RESTful architecture.

FLEXIBLE INTEGRATION

SMTP’s API is built with agility in mind, allowing you to scale your sending and
adapt to your needs.

POWERFUL REPORTING

Easily access comprehensive reports on your email delivery and engagement
performance.


WHY BUSINESSES TRUST SMTP


4.7/5 G2 Crowd Verified Rating
 4.5/5



"ALWAYS DELIVERS"

It is easy to set up, secure and gives me analytics that helps me keep my lists
up to date. It just works.
 * G2 Crowd verified review


"GREAT RESULTS"

Deliverability is top of the line. Their servers seem to consistently stay off
(ISP) blacklists. Great deliverability.
 * G2 Crowd verified review


"BEST INFRASTRUCTURE"

Very good infrastructure with white-listing dedicated sending IPs and in-depth
reporting. Great service.
 * G2 Crowd verified review

There was as a marked improvement in our email deliverability with SMTP, and we
scaled our email marketing program from under 1 million to over 5 million emails
a month while preserving sender reputation.
Tim Driver
CEO, Retirement Jobs
What an improved customer service experience! I’ve been with you guys for
several years now, and today’s help was speedy via both online chat and
telephone. I’m relieved and happy!
Cynthia Cross
Hagen/Sinclair Research
Service is fast, friendly and helpful. They’re always willing to work with us to
resolve any issues or improve our results. They help us improve our
deliverability and make sure our emails get to inboxes.
Leslie Stubblefield
Insurance Media Services

> MOVE TO SMTP


EFFORTLESS MIGRATION AND RELIABLE EXPERT SUPPORT.

Every month, we onboard thousands of new customers and hundreds of turnkey
migrations from other providers. SMTP further provides reliable,
always-available in-house customer support.

Get a custom quote

EXPERT SUPPORT

Get help when you need it with our in-house support and access to delivery
experts.

CUSTOM API INTEGRATIONS

Get expert integration and development help from our experienced team that will
guide you along each step fo the way.

TURNKEY MIGRATION

We help hundreds of customers migrate every month from providers like Sendgrid,
Mailgun and more.

MANAGED ON-BOARDING

Have our distinguished account management team on-board your business onto SMTP
in the most seamless and effortless way.

> GET STARTED


PURCHASE AN SMTP EMAIL RELAY PLAN

Get started small and scale effortlessly. All SMTP plans come with Reputation
Defender as an optional add on.

GET STARTED WITH 50,000 EMAILS FOR $25/ MO.

Purchase
Or view all plans

SMTP.com is a premium email delivery and email relay solution that enables you
to send and track high volume emails effortlessly.

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— SERVICES

 * Email Relay API
 * Transactional email
 * SMTP for developers
 * SMTP for marketers
 * Managed delivery

— GET STARTED

 * Pricing
 * Free Quote
 * SMTP for startups
 * API documentation
 * Integrations

— ABOUT

 * About us
 * Why SMTP
 * Contact us
 * Resource center
 * Email Deliverability Blog

— LEGAL

 * Privacy policy
 * Terms and conditions
 * Refund policy
 * Partner program policy
 * Code of ethics and business
 * Acceptable use policy

©2021 Ziff Davis, Inc. or its subsidiaries (collectively, “Ziff Davis”). All
rights reserved.
SMTP.com is a trademark or registered trademark of Ziff Davis.

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