Best Transactional Email Services for Linux of 2026

Routee is an intelligent omnichannel communication platform. (CPaaS), Routee offers advanced Web and API automation for all industry sectors. Routee's services are powered by AMD Telecom's strong infrastructure. They enable businesses to optimize marketing and business processes. -SMS Marketing: Custom-made messages based upon customers' individual preferences -Email Marketing: personalized newsletters and email campaigns based upon audience behavioral data -Transactional email: automated emails to customers regarding important data about their transactions -Marketing Automation: Rich forms & customer data capture. Automate repetitive marketing tasks and track marketing campaigns. -Two factor authentication: A second layer of security that includes fallback via SMS, Voice, Viber, and Missed Call -Cloud IVR: Multilingual capabilities, including the ability to convert speech into text and text to human-sounding text -Push Notifications: personalized web and mobile push notifications based on segmentation.

Reliable SMTP relay services and email delivery services. You can send and track large volumes of emails with ease using powerful email delivery services. In minutes, integrate and you can start sending. All your email delivery, transactional and email relay needs are covered under one roof. SMTP can deliver whether you need a reliable backend solution or scalable infrastructure to handle large volumes of emails. Reputation Defender, SMTP's proprietary technology, uses big data to proactively monitor and protect your email list health. It also suppresses bad emails from soft and hard bounces in order to protect your IP reputation and domain. This will ensure that your delivery rates and inbox placement gradually improve over time.

ClickSend: A simple, battle-tested SMS API built for developers. Ship messaging features in minutes with a clean API, reliable infrastructure and zero lock-ins. Why devs and sysadmins trust us: - Direct carrier routes to 190+ countries — no middleman - 99.95%+ uptime, low latency, high throughput - Billions of messages delivered globally - Pay-as-you-go pricing — no contracts - 24/7 support from people who actually understand APIs Works the way you code: Integrate via REST API, use pre-built SDKs (PHP, Python, Ruby, Node.js, C#), or trigger via webhooks. Already using Zapier, Make, or Power Automate? We've got you covered with pre-built integrations ready to go. It works straight out of the box — and keeps working when you scale from 100 to 100 million messages. No lock-ins. No fuss. Just reliable SMS infrastructure you can trust. Perfect for: 2FA, alerts, monitoring notifications, transactional messaging, user onboarding flows and anything else that needs to reach people fast.

MailCarry, a powerful, self-hosted email marketing tool that allows you to send unlimited emails, is available for download. MailCarry is a powerful self-hosted email marketing application that offers a wide range of features, including efficient contact and list management, as well as flexible sending, automated follow ups and drips. It is far ahead of other programs. MailCarry makes it easy to prepare your next sales call and email marketing campaign.

EmailLabs is a cloud-based email API and SMTP service designed to send transactional and marketing emails. The unique know-how and partnership between well-know Inbox Service Providers ensure all emails sent from our servers being tailored to the requirements of foreign providers like: Gmail, Yahoo or Hotmail as well as local ISPs such as WP.pl, Onet.pl, Seznam.cz, Web.de, Seznam.cz or Libero.it. We take care of overall deliverability to make sure your messages land in customers’ inboxes, promotions or Offers tab. EmailLabs platform can be easily integrated with any email system or application that allows you to add a third party SMTP server. The whole setup process takes only 5 minutes.

CXONCLOUD, a B2B SaaS, is designed to manage and measure customer satisfaction in just a few clicks. One solution that provides unlimited customer feedback, loyalty, awards and rewards, as well as referral marketing and email automation. It helps businesses deliver a seamless customer experience across all touchpoints. CXONCLOUD improves search and simplifies customer engagement, whether it's feedback or booking. It can automatically recognize customer sentiments and alert any impending negative word of mouth. This all-in-one app automatically measures customers' loyalty and has readymade loyalty campaigns that can be used to engage customers via email and social media. Small businesses can easily get referrals from loyal customers with just a few clicks using the built-in referral marketing campaigns. Loyal customers can be rewarded by QR codes and promo codes, as well as automatic list generation and rewards management modules.

Finally, an email platform built by marketers for marketers. This is the most flexible, dynamic, and flexible marketing automation solution available for your mobile and email needs. Are you tired of outdated platforms that are too complicated to use, too expensive, or too difficult to learn? You are not the only one. We created iPost because of this. iPost provides all the tools you need. The platform is easy to learn and flexible enough that you can adapt it as your business grows. The iPost email platform was designed to meet the needs of today's marketer and provide the flexibility and features necessary to grow with future marketers. iPost offers powerful features for email marketing with technology that's flexible, responsive, and easy to use. Real-time data for audience discovery, targeting, and personalization. Intuitive reporting from campaign trends to funnel and conversion tracking. Drag and drop personalization, dynamic contents and code-free design tool.