SMTP.com

> TRANSACTIONAL AND EMAIL relay API

Exceptional Email Deliverability

We are the industry leader in deliverability. Experience SMTP.com for yourself to see why our customers love us, and why those who leave often come back.
reliable SMTP email relay and delivery services
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Your complete email delivery suite.

At SMTP, our goal is to get your emails into subscriber inboxes. Aside from maintaining an impeccable IP reputation among ISPs and offering you the absolute best in email sending, we have the in-house experts to answer all of your questions.

Effortless Onboarding

It's just a few quick steps from sign up to your first send. You'll be sending your first email within minutes.

Scalable Infrastructure

From a few thousand emails per month to billions, SMTP scales effortlessly for timely reliable sending.

Industry-leading delivery

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

All backed by expert support for our customers worldwide, regardless of your pricing plan.

SMTP Reputation Defender

Reputation Defender proactively monitors your email list health and safeguards your domain and IP reputation by suppressing invalid emails addresses before you send. This ensures your delivery rates and inbox placement incrementally gets better over time.
REPUTATION DEFENDER IS AN OPTIONAL ADD ON FOR ALL SMTP PLANS
reputation defender SMTP

High Volume Sender?

SMTP has a purpose-built solution just for you

The needs of our high volume senders are unique. We'll set you up with a rapidly scalable, on-demand solution for your sending requirements.

As with all of our customers, high volume senders benefit from SMTP's excellent deliverability and 20+ years of email expertise.
SMTP for marketers for better KPI
A dedicated platform
Each customer is given their own dedicated instance of SMTP in a private and secure cloud environment.
Flexibility
Volume can be scaled up or down quickly to meet sending needs due to seasonality or changing business conditions.
Reputation Defender
In app, automated email address validation protecting domain and sending reputation with ISPs
Each high-volume sender receives a dedicated account manager, a tailored IP-warming and volume ramp-up plan, and access to expert support.

Use SMTP for all of your email sending needs.

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.

Why Businesses Trust SMTP

"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
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
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
Leslie Stubblefield
Insurance Media Services

Purchase an SMTP Email Relay plan

Get started with 50,000 emails for $25/ mo.