About SMTP Email Delivery & Transactional Email API | SMTP.com
Overview
SMTP.com is an email delivery platform that sends transactional and marketing email through a relay API built for high deliverability. It operates as the delivery backbone of the Ziff Davis Martech Division and has served more than 100,000 businesses for over two decades, reporting a 98% delivery rate and 99% uptime. The company's global headquarters is in New York, NY, USA.
The service combines scalable infrastructure, dedicated IP options, and in-house email delivery experts on every plan. Optional add-ons, Reputation Defender and the SMTP Insight Engine, extend the platform with list-health monitoring and data-enriched customer insights.
Key Benefits
- Deliverability-first sending: Maintain a strong reputation among ISPs to keep emails out of spam folders and in subscriber inboxes.
- Scalable infrastructure: Grow from a few thousand emails per month to billions without losing delivery speed.
- Dedicated IPs: Starter, Growth, and Business plans include a dedicated IP to protect sender reputation.
- Rapid onboarding: Move from sign-up to your first send within minutes.
- Expert support: In-house email delivery specialists answer questions on every plan.
- List protection: Reputation Defender suppresses invalid addresses before you send, improving inbox placement over time.
How It Works
Customers sign up for an SMTP email relay plan and complete a short onboarding flow to start sending within minutes. They connect through the Email Relay API to send transactional or marketing email, choose shared or dedicated IPs, and track results with detailed reporting. High-volume senders receive a dedicated instance of the platform with a tailored IP-warming and volume ramp-up plan.
Use Cases
- Developers: Send authentication codes, notifications, and other transactional email through the Email Relay API.
- E-commerce teams: Deliver order confirmations and billing details to customers on time.
- SaaS platforms: Trigger status and policy-change emails that keep users informed.
- Marketers: Run high-volume campaigns while preserving sender reputation and inbox placement.
- High-volume senders: Send 250 million or more emails per month from a private, dedicated cloud instance.
Why Choose This Product
SMTP.com backs its delivery claims with more than 22 years of email experience, a verified 4.7/5 customer rating, and a unified ecosystem of brands under the Ziff Davis Martech Division. Teams switching from SendGrid or Mailgun get turnkey migration and managed on-boarding, though protections such as Reputation Defender and the Insight Engine require a paid add-on.
SMTP Email Delivery & Transactional Email API | SMTP.com Pros & Cons
- Claims 98% delivery rate and 99% uptime
- Plans scale from 50,000 to billions of emails monthly
- Dedicated IP included on Starter, Growth, and Business plans
- Turnkey migration from SendGrid, Mailgun, and others
- Verified 4.7/5 customer rating
- Reputation Defender and Insight Engine require a 20% add-on fee
Key Features
Email Relay API
Essential+Send transactional and marketing email programmatically through the Email Relay API with reliable delivery.
Reputation Defender
Essential+Optional add-on that monitors list health and suppresses invalid addresses to protect domain and IP reputation.
SMTP Insight Engine
Optional add-on providing data-enriched customer insights to support engagement and monetization via email.
Dedicated IPs
Starter+Starter, Growth, and Business plans include a dedicated IP address for sender reputation.
Scalable Infrastructure
Scales from a few thousand emails per month to billions while keeping delivery timely and reliable.
Detailed Reporting
Essential+Every plan includes detailed reporting on delivery performance.
Turnkey Migration
Migrate from providers such as SendGrid and Mailgun with managed on-boarding and custom API help.
Expert Support
Essential+In-house email delivery experts answer questions on every plan, with dedicated account managers for high-volume senders.
SMTP Email Delivery & Transactional Email API | SMTP.com Pricing
View full pricing →- 50,000 emails per month
- Shared IP
- Email Relay API
- Expert support
- Detailed reporting
- Reputation Defender available as add-on
- 100,000 emails per month
- Dedicated IP
- Email Relay API
- Expert support
- Detailed reporting
- Reputation Defender available as add-on
- 500,000 emails per month
- Dedicated IP
- Email Relay API
- Expert support
- Detailed reporting
- Reputation Defender available as add-on
- 1,000,000 emails per month
- Dedicated IP
- Email Relay API
- Expert support
- Detailed reporting
- Reputation Defender available as add-on
- Minimum of 250 million emails per month
- Dedicated instance of the SMTP platform
- 100% dedicated IP and MTA
- Dedicated and scalable API, callbacks and webhooks
- On-demand statistics aggregation
| Feature | Essential $25/mo | Starter $80/mo | Growth $300/mo | Business $500/mo | High Volume Senders Custom |
|---|---|---|---|---|---|
| Email Relay API | |||||
| Reputation Defender | |||||
| Dedicated IPs | |||||
| Detailed Reporting | |||||
| Expert Support |
Pricing extracted from the product website and may change. Check the source for current details.
Frequently asked questions about SMTP Email Delivery & Transactional Email API | SMTP.com
How much does SMTP.com cost?
Standard plans start at $25 per month for 50,000 emails (Essential) and range up to $500 per month for 1,000,000 emails (Business). High-volume senders with a minimum of 250 million emails per month receive a custom quote.
Can I migrate from SendGrid or Mailgun?
Yes. SMTP performs turnkey migrations for hundreds of customers every month from providers including SendGrid, Mailgun and more, supported by managed on-boarding and custom API integration help.
Do SMTP plans include a dedicated IP?
Starter, Growth, and Business plans include a dedicated IP address. The Essential plan uses a shared IP, while high-volume senders receive a 100% dedicated IP and MTA.
What is Reputation Defender?
Reputation Defender is an optional add-on available on all plans at 20% of the plan cost. It proactively monitors email list health and suppresses invalid addresses in real time to protect domain and IP reputation and improve inbox placement.
What is the SMTP Insight Engine?
The Insight Engine is an optional add-on available on all plans at 20% of the plan cost. It provides data-enriched insights into your customers through an enhanced profile view, helping you engage and monetize them via email.
Can I pay with PayPal?
Yes. In addition to credit cards, SMTP accepts payment via PayPal when you select a plan to get started.