Unlike other types of digital marketing, email marketing can get quite technical, especially if you plan on sending transactional emails or thousands of emails per day. But unlike other digital marketing channels, email marketing has some of the highest ROI, as high as $44 for every $1 spent.
To reach these ROI rates, however, you need a reliable SMTP email relay service ready to meet your demands. The reason these services are becoming so popular comes down to one simple fact - deliverability.
High deliverability equals reliability in the email world. Having the ability for your mass email campaigns to reach their designated inboxes has its worth weight in gold. That’s because ISPs can flag your emails as spam and if that happens, you can kiss your campaign goodbye.
That’s why we’re here to tell you all about the 12 best SMTP email relay services. But before that, let’s learn a bit more about what these services are.
What Is an SMTP Email Relay Service?
SMTP is short for simple mail transport protocol. An SMTP email relay service is a specialized service that facilitates the sending of emails from one server to another, ensuring reliable delivery of messages. When you send an email, your message first goes to your SMTP server, which acts like a local post office. If the recipient's email server is different, the SMTP relay service takes over, routing your email to the correct destination.
This service is crucial for businesses that need to send a high volume of emails, such as newsletters or transactional messages. By using an SMTP relay, you can avoid issues like being flagged as spam, which often occurs when sending bulk emails directly from your own server. The relay service manages the technical aspects of email delivery, allowing you to focus on your core business activities.
Additionally, SMTP relay services often include features like email tracking, analytics, and improved deliverability rates. They help ensure that your emails reach their intended recipients efficiently and securely, leveraging a robust infrastructure that many organizations may not have in-house.
How Do SMTP Email Relay Server Work?
When you send an email, you expect it to reach the recipient's inbox quickly and reliably. This seamless process is made possible by SMTP email relay servers, which act as the backbone of email delivery. But how exactly do these servers work?
SMTP, or Simple Mail Transfer Protocol, is the standard technology used to transfer email messages from your email client to the recipient's server. When you hit "send," your email client communicates with an SMTP server, which then relays your message to the recipient's email server. The SMTP relay server takes care of the entire journey, ensuring your email is routed correctly, overcoming any obstacles like spam filters, and eventually landing in the recipient’s inbox.
In essence, SMTP email relay servers act as intermediaries that manage the flow of email traffic, making sure your messages are delivered efficiently and securely. This process not only enhances email deliverability but also helps you avoid the pitfalls of being flagged as spam, which is crucial for maintaining a good sender reputation.
Summary of the Top SMTP Email Relay Services
Top SMTP Email Relay Services
Omnisend stands as a dynamic platform at the forefront of SMTP Email Relay Services. It distinguishes itself through its mastery of email and SMS marketing, characterized by customizable templates, a user-friendly interface, and a rich array of innovative features. Omnisend empowers businesses not only to amass subscribers but also to engage customers through bespoke email and SMS campaigns, fostering lasting connections. Omnisend has been the driving force behind successful collaborations with notable brands like Amundsen Sports, Snatcher, Inglot, SM Global Shop, and many others. These collaborations have yielded remarkable results, showcasing the platform’s capabilities in enhancing marketing strategies. Delving into its standout offerings: Campaigner emerges as a distinguished choice among SMTP email relay services, offering a robust solution designed for both marketing and transactional email dispatches. With a focus on delivering emails that reach the inbox and engage recipients, Campaigner stands out for its reliable and secure email delivery system. Key to Campaigner’s success is its dedication to seamless, hassle-free communication. Businesses can send important transactional and marketing emails without the burden of managing in-house mail servers. This service is built on a foundation of proven reliability, offering full visibility into every email sent. Customers gain insights into email deliverability and interaction, ensuring no message goes unnoticed. SMTP is one of the best email relay and deliverability providers and can help you to send a volume of email without breaking the bank or your email rep. As they like to put it on their website — they’re “engineered for reliable delivery at scale”. To give you a better idea of just how powerful and popular this tool is, here are some key numbers: With SendPulse’s SMTP service, you can send transactional emails from your website. Then, to stay up to speed with the performance of your email marketing campaigns, you can also check SMTP stats in the mailing history. Here, you’ll find info like the number of emails sent, opens, delivery rate, bounces, and unsubscribe rate presented in an easy-to-digest graph which can also be exported as a report in CSV format. While it’s a powerful email marketing tool (and the hundreds of online reviews SendPulse has received are evidence of that), it can do so much more. Included in its products are SMS campaigns, a chatbot builder, and landing pages. Trusted by a number of names in the sharing economy like Airbnb and Uber, SendGrid helps its users to send over 100 billion emails on a monthly basis. You can either plug into their SMTP relay for standardized sending or improve your SMTP relay sending with their SMTP API. As you would expect of one of the more established players in transactional email software, in addition to offering reliable email delivery, it also offers various other useful products to help you grow and improve your email marketing campaigns. These include: Amazon has become more than just an online marketplace. From affiliate programs to various solutions for advertising and marketing, it can help you to drive more revenue in more ways than one. For help specifically with email marketing, you can check out Amazon Simple Email Service (aka Amazon SES). You can use its SMTP interface or API to send emails. It offers various SMTP-enabled programming languages. Then, to help you keep track of your email campaigns’ performance, it includes features like: It doesn’t matter if you’re running a bootstrapped startup or an agency with multiple clients, Postmark, created by ActiveCampaign, one of the best email marketing software platforms can come in handy. Included in its list of features is an SMTP service and supports TLS for data security. Not only is it secure, but also fast. As it’s a globally distributed SMTP service with endpoints in various regions, the latency is very low. Thanks to its pricing and long free trial, Moosend is a great tool for small businesses. While its SMTP server isn’t included in the free trial, with pricing starting at less than $10 per month, it’s still one of the most affordable plans on the market. In addition to its cost-effectiveness, another standout feature is that it includes reporting and analytics that you can use to keep track of how your transactional campaigns sent by means of their SMTP service performs. In fact, according to G2, its reporting has been rated as well above average. Other features that Moosend users have praised are its: Used by more than 150,000 developers and companies that include leading names in email marketing like Omnisend, Mailgun has established itself as one of the biggest transactional email software solutions. Its industry-leading SMTP relay services means that businesses don’t have to manage their own mail servers to send transactional as well as promotional emails. Not only does this free up time, but also reduces costs. All you need to do is add and authenticate your domain name and Mailgun will share all the key details inside your account. If your email volume should increase, you can also switch over to their email API to speed up processes. In fact, their mail send API has been rated well above average. Mailjet offers a free SMTP server that’s simple to set up and integrates with any system. Basically, the only action that you need to take is update your SMTP server setting with the credentials they provide so that their server is used as a “smarthost” or “relay”. However, if you should get stuck, rest assured that their multi-lingual support team of deliverability specialists is at hand to guide during all the different phases. Not only is it intuitive, but it also offers flexibility and supports a selection of ports. And, its versatility doesn’t stop there. Another advantage of using Mailjet’s SMTP servers is that link trackers get added automatically enabling you to monitor opens and clicks efficiently. If you don’t want to expand your focus on email marketing and simply need a tool to help with email sending and testing, you can check out Mailtrap, one of the top email testing tools. Trusted by individual users as well as businesses that include names like PayPal, Calendly, and Adobe. Mailtrap offers a number of powerful features and tools that include: If you’re just interested in its SMTP service, you can look forward to high deliverability rates, in-depth analytics, and deliverability alerts. You can also inspect your configuration by sending a test email first.1. Omnisend
2. Campaigner
3. SMTP
4. SendPulse
5. SendGrid by Twilio
6. Amazon SES
7. Postmark
8. Moosend
9. Mailgun
10. Mailjet
11. Mailtrap
Benefits of Using SMTP Email Relay Services
Utilizing SMTP email relay services offers several advantages for businesses looking to enhance their email communication and marketing efforts:
Flexible Email Infrastructure
You can choose between internal servers or cloud-based options, allowing for seamless integration with existing systems without the need for extensive maintenance. For instance, Brevo (formerly Sendinblue) offers both SMTP relay and various setup options like email API and webhook, making it versatile for growing brands.
Enhanced Deliverability and Reputation Management
These services protect your primary domain from being blocklisted by using dedicated domains for bulk emails, ensuring that your marketing communications reach their intended recipients. Campaigner, for example, excels in ensuring emails reach the inbox through rigorous monitoring and maintaining a strong sender reputation.
Bulk Email Handling
SMTP relay services are designed to efficiently manage high volumes of emails, enabling businesses to scale their operations without infrastructure limitations. SMTP.com, known for sending billions of emails monthly, provides a reliable platform engineered for delivery at scale.
Compliance and User Management
They help ensure adherence to email marketing regulations by managing opt-out and unsubscribe features, which is crucial for maintaining compliance. SendPulse, for example, offers detailed stats and compliance features that help businesses stay within legal boundaries while managing high volumes of emails.
Advanced Tracking and Analytics
You gain access to detailed insights about email performance, including delivery rates and open rates, allowing for data-driven optimizations of your email campaigns. Omnisend, known for its data-driven insights, empowers businesses to optimize their email marketing strategies with precise tracking tools.
Improved Security and Reliability
These services provide secure transmission of messages and help reduce the load on internal servers, enhancing overall operational efficiency. Postmark, with its globally distributed SMTP service, ensures low latency and secure email delivery, making it a trusted option for businesses requiring high security and speed.
How to Pick the Right SMTP Email Relay Service
Choosing the right SMTP email relay service involves several key considerations:
1. Reputation and Reliability
Look for providers with a strong reputation and proven track record in email deliverability. A service like SMTP.com, known for its 98% delivery rate and over 20 years of experience, can significantly enhance your sender reputation and ensure your emails consistently reach their intended recipients.
2. Scalability
Ensure the service can handle your email volume as your business grows. For example, Amazon SES offers a highly scalable solution that adjusts to your needs, whether you’re sending a few thousand emails or millions, without hitting ISP-imposed sending limits.
3. User-Friendly Interface
Opt for a service that offers an intuitive interface for managing campaigns, which can save time and reduce complexity in your email marketing efforts. Campaigner, with its user-friendly drag-and-drop builder and easy-to-navigate platform, makes campaign management more straightforward, especially for small to medium-sized businesses.
4. Support and Documentation
Good customer support and comprehensive documentation are essential for troubleshooting and maximizing the use of the service. SendGrid by Twilio is renowned for its responsive customer support and extensive documentation, ensuring users have the resources they need to resolve issues quickly and effectively.
5. Advanced Features
Consider services that provide analytics, tracking, and compliance tools to help you manage your email campaigns effectively and ensure regulatory adherence. Omnisend, with its advanced analytics and segmentation capabilities, empowers businesses to make data-driven decisions while maintaining compliance with email marketing regulations.
Source: Omnisend
Wrapping Up
Selecting the right SMTP email relay service is crucial for maximizing the effectiveness of your email marketing efforts. With email marketing offering one of the highest ROIs among digital channels, the reliability and deliverability of your emails become paramount. A robust SMTP relay service ensures that your messages reach their intended recipients, protecting your sender reputation and avoiding spam filters.
As you consider options, prioritize services with proven reliability, scalability, and user-friendly features. By choosing the right service, you can effectively manage high volumes of emails, enhance your marketing strategies, and ultimately drive better business outcomes.
Frequently Asked Questions
What is an SMTP email relay service?
An SMTP email relay service is a specialized platform that facilitates the transmission of emails from one server to another. It acts as an intermediary, ensuring reliable and efficient delivery of messages between different email providers.
Why should I use an SMTP email relay service?
Using an SMTP email relay service offers several benefits, including:
- Improved email deliverability and sender reputation
- Ability to handle large volumes of emails
- Expert technical support and guidance
- Detailed analytics and tracking capabilities
- User-friendly interfaces for managing email campaigns
How do I choose the best SMTP email relay service for my needs?
When selecting an SMTP email relay service, consider factors such as:
- Reputation and reliability of the provider
- Deliverability rates and sender reputation management
- Scalability to handle your email volume
- Advanced features like analytics, tracking, and compliance tools
- Ease of use and customer support availability
What are some of the top SMTP email relay service providers?
Some of the best SMTP email relay service providers include:
- Brevo
- Campaigner
- SMTP.com
- Omnisend
- SendPulse
- SendGrid by Twillo
- Amazon SES
- Postmark
- Moosend
- Mailgun
- Mailjet
- Mailtrap
How do SMTP email relay services work?
When you send an email using an SMTP relay service, the process typically involves:
- Your email client connects to the SMTP server
- The server determines the best route for your email
- The email is forwarded to the recipient's mail server
- The recipient's server delivers the message to their inbox
