SMTP, which stands for Simple Mail Transfer Protocol, is a communication protocol utilized for the transmission of email messages over the internet. SMTP is responsible for sending messages from one server to another and is the primary method of email delivery used today.

It works by establishing a connection between the email client and the SMTP server, verifying the sender's identity, and routing the email to the recipient's email server. SMTP is a critical component of modern email communication and is used by individuals, businesses, and organizations to send and receive email messages worldwide.

The protocol's reliability and efficiency have made it an integral part of modern-day communication, ensuring that emails are delivered promptly and securely.

Choosing the best SMTP (Simple Mail Transfer Protocol) service is crucial for anyone who relies on email communication, whether it's for personal or professional purposes. The right SMTP service can ensure that your emails are delivered reliably and securely, with a high deliverability rate, and without being flagged as spam.

Some of the best SMTP services in the market offer advanced features such as SMTP integration, email automation, detailed analytics, and better email security. These services can help you streamline your email campaigns, improve your email marketing strategy, and build better relationships with your subscribers.

When selecting the best SMTP service for your needs, it's essential to consider factors like pricing, ease of use, customer support, and overall performance. With the right SMTP service, you can take your email communication to the next level and enjoy all the benefits that come with a reliable and efficient email delivery system.

1. MailerSend

If you're seeking a transactional SMTP service, look no further than MailerSend. Developed by the team behind MailerLite, a top email marketing service provider, with a decade of experience in the email marketing field, MailerSend has been able to achieve exceptional email delivery rates.

What sets MailerSend apart as one of the best SMTP services on the market is its user-friendliness. MailerSend is designed to accommodate the needs of both individual users and teams of developers and marketing professionals. Additionally, MailerSend is robust enough to handle the sending of a few emails or millions, making it a versatile option for businesses of any size.


  • Firstly, MailerSend provides you with two options to send your transactional emails – its RESTful API or SMTP relay – which eliminates the need to manage any email servers.
  • One unique feature of MailerSend is its ability to handle inbound routing of emails. This means that the application can receive emails on your behalf and facilitate email replies, setting it apart from other SMTP service providers that only offer relay servers.
  • Moreover, MailerSend goes above and beyond by offering a drag and drop email builder, readymade email templates, and dynamic tags for personalization.
  • To enhance your email delivery and maintain your sender reputation, MailerSend supports domain authentication by adding SPF, DKIM, and DMARC records in your DNS records.
  • Offers multiple integrations via Zapier and Integromat, which amplifies its use cases. Additionally, its prompt 24/7 customer support ensures that you receive timely assistance whenever you need it.


  • Free
  • Premium – $25.00 per month
  • Enterprise – Contact sale

2. SendPulse

SendPulse presents itself as a multi-channel marketing platform rather than just an email marketing service. However, it gained popularity primarily for its SMTP services, making it not only an all-in-one marketing platform but also the top choice for the best SMTP service for email marketing.


  • SendPulse positions itself as an all-in-one marketing platform, but it excels as the top SMTP service for sending bulk emails.
  • One of SendPulse's standout features is its API, which is available in six different languages, making it easy to integrate with any CRM, CMS, or email builder platform.
  • With the exception of the Basic plan, SendPulse provides users with a dedicated IP address for sending email campaigns.
  • Along with SMTP, SendPulse offers a comprehensive email marketing solution, web push notification services, SMS marketing, a Facebook chatbot, and various add-ons.


  • Free
  • Standard – $6.40 per month
  • Pro – $7.68 per month
  • Enterprise – $10.75 per month

3. Moosend

Moosend may have been an unlikely contender for the best SMTP service provider, but thanks to its ongoing improvements, it has earned its place among the top providers. While Moosend is primarily an email marketing suite, it also offers SMTP as a separate service. This approach has helped it attract a significant user base from around the world.


  • While primarily known for its transactional email capabilities, Moosend is also a reliable option for marketing emails.
  • Moosend prides itself on being easy to integrate with any bulk emailing platform, streamlining the process for users.
  • With Moosend, there's no need to overload your own servers with bulk email sending. Its spam-free servers handle the load for you.
  • To ensure optimal deliverability and prevent emails from being marked as spam, Moosend authenticates your emails as you send them.


  • Free
  • Pro – $7.00 per month
  • Enterprise – Contact sale

4. Elastic Email

Elastic Email has established itself as one of the cheapest SMTP servers for email marketing, making it a popular choice for developers and marketers. While it may not have been considered one of the best SMTP services a few years ago, Elastic Email has made significant improvements and advancements to now be regarded as one of the top services available.


  • Elastic Email prioritizes email delivery and implements SPF, DKIM, and DMARC for maximum deliverability.
  • Elastic Email offers its own email designer for easy email drafting.
  • Elastic Email's API allows for easy integration with any app, software, or website.
  • Elastic Email provides real-time reporting to monitor the performance of your email campaigns.


  • Free
  • Starter – $9.00 per month
  • Pro – $60.00 per month

5. Mailjet

Mailjet, a company that has been operating since 2010, claims to have served 130,000 businesses with its email marketing, SMTP, and other solutions. Furthermore, recent tests on email delivery indicate that Mailjet has successfully delivered a significant majority of emails to a vast majority of mailboxes, placing it among the leading providers of SMTP services.


  • Mailjet is confident in its easy integrability, allowing users to start sending emails within minutes of configuring settings.
  • The SMTP service prioritizes the safety and protection of emails and offers users the option to use TSL or SSL encryptions.
  • Mailjet guarantees inboxing after setting up SPF, DMARC, and DKIM records for domain authentication.
  • Users can create responsive emails using Mailjet's builder, track email campaigns, and receive alerts in case of delivery issues.


  • Free – $0.00
  • Essential – $15.00 per month
  • Premium – $25.00 per month
  • Custom – get a quote


In conclusion, there are several top SMTP service providers in the market that offer free trials to their users. These trials can help you test the platform before you make a decision to invest in their services. MailerSend, SendPulse, Moosend, Elastic Email, and Mailify are some of the best SMTP services that offer free trials. These platforms not only provide reliable email delivery rates but also offer several features like drag & drop email builders, domain authentication, real-time reporting, and more. Choosing the right SMTP service for your business can significantly improve your email marketing campaigns, and trying out a free trial can help you make an informed decision.

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