SMTP2GO!

Scalable email delivery for transactional emailSendGrid transparently handles DKIM, SPF, ISP rate limits, content inspection, bounces, and spam reports to help users achieve higher deliverability. SendGrid integrates in minutes by just changing three SMTP settings.

Mailgun is email automation for developers. Use our REST APIs to effortlessly send, receive and track email from your website or application.

Cloud Emailing by Mailjet. Create, send and track your marketing and transactional emails. Easy SMTP integration & cheap rates: boost your deliverability now!

Elastic Email offers an SMTP Relay, HTTP API, and fully featured browser based UI for managing marketing and transaction email.

Postmark removes the headaches of delivering and parsing transactional email for webapps with minimal setup time and zero maintenance. Send API and SMTP interface.

Send emails and know when they were opened. Keep detaile email logs to who they were sent and when. A memo system to help organizations notify thier employees and keep everyone on the same page. Simple and easy to use email memo service.

turboSMTP is a world-leading SMTP provider.Our outgoing mail server guarantees secure SMTP relays and it's ideal to send transactional emails. It also provides an amazing SMTP API for developers of cloud applications and a free SMTP server service.

Smart SMTP server for email marketing. Personal server distribution, automatically results in 5 minutes, their ' senders, automatic replies, the statistics in real-time and friendly support for each

Get 3 months free "Unlimited Transactional Emails" with Pepipost.

CloudMailin allows to receive any volume of incoming email. You are given an email address that will forward any incoming message to your app, as an HTTP POST, within milliseconds. You can also seamlessly check the delivery status of each of your incoming emails via the dashboard, bounce emails that you do not wish to receive and use your own domain name.

JangoSMTP lets you send transactional emails via SMTP or API. It's the first transactional email service to offer open and click tracking.

outMail providing a secure and trusted email relay (also known as SMTP Smart Host or mail proxy)

A simple API and Dashboard to manage and optimize emails sent by your application to your customers.

SMTP Logic integrates with your current email system to automate all aspects of email processing, from analytics to security.