SMTP, Relay and Deliverability

A list of SMTP, Email Relay and deliverability providers that matter

Looking for the right software to send your email and get it delivered? Below is our hand-curated list of SMTP, Email Relay and deliverability companies that matter, making it easier to go through and pick the best email send provider to get your emails delivered to the inbox

SMTP2GO

Reliable & Scalable Email Delivery Service

SMTP2GO is an international SMTP Relay and outgoing email service for sending transactional and marketing emails.
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SMTP.com

SMTP and Reliable Email Relay

SMTP.com is an email service provider exclusively focused upon the execution of email delivery for marketing and enterprise applications.
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Mailersend

Advanced transactional emails and smtp relay

MailerSend is a transactional email service designed for collaboration across different teams.Built by deliverability experts to ensure your emails get delivered. Real-time analytics help you learn and optimize.
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Bluefox Email

Beautiful & Consistent Emails for Modern Companies

An email platform for companies that care about quality email communication. Create pixel-perfect email designs that render well on all major email clients. Make sure that all of your emails (transactional & marketing) are consistent and reach the inbox of your recipients.
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Bouncer

Email Verification and Validation Service

Bouncer is an email verification and email validation provider to help keep their email lists clean and deliverability high.
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EmailSuccess

High Performance Mail Transfer Agent (MTA)

EmailSuccess is an enterprise level SMTP Server and MTA (Mail Transfer Agent) solution for high volume email. EmailSuccess is fit for senders of any size: ESPs and Marketing Automation Companies.
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Inboxroad

SMTP Service & Email Delivery service

Inboxroad outbound mail servers provide a solid foundation to ensure the highest inbox rates for your email.
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Maileroo

Email Delivery & Automation

Send transactional and marketing emails with ease using a platform designed for high deliverability. Setup in minutes, access real-time analytics, and start scaling your email delivery to meet your needs.
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Mailersend

Advanced transactional emails and smtp relay

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Mailgun

Mailgun is an SMTP relay service to send marketing and transactional emails. Developper focussed, they offer API email sending and managed email delievrability services.
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Mailjet

Powerful Emailing Service and Effective Email Solution

Mailjet is a powerful email service provider that ensures maximum insight and deliverability results for marketing and transactional emails.
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Mailtrap

Email delivery platform designed for businesses to drive revenue.

Email tools and expertise to grow your revenue. For developers: RESTful API / SMTP - quickly integrate with your app and deliver emails. For marketers: Email campaigns to create and send impactful campaigns.
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mySMTP

Email SMTP service

mySMTP sends emails in high or low volumes. Locally and globally. With your own IP or shared IPs.
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Ongage

Platform for email and Performance Marketers

Ongage is the first email marketing front-end platform that connects to multiple Email providers, ESPs and SMTP relays to increase deliverability and ROI
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Postmark

Transactional Email Service, Email Delivery

Postmark enables web applications to deliver and track transactional email, with short setup time and zero maintenance.
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Postmastery

Email infrastructure, deliverability & monitoring

Postmastery provides ‘best in class' tools & services for email infrastructure, email delivery optimization and email monitoring. Deliverability tools and services created for and by email deliverability experts.
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SendForensics

Email deliverability monitoring solution

SendForensics is a global provider of unique pre-emptive deliverability and network management solutions for email marketers, agencies, ESPs and enterprise-level high-volume senders.
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SendGrid

Email Delivery Service

SendGrid helps marketers focus on their business without the cost and complexity of owning and maintaining an email infrastructure to ensure deliverability. SendGrid can manage all of the technical details, from scaling the infrastructure, ISP outreach, reputation monitoring, whitelisting services and real time analytics.
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