Email has become an essential component of our daily lives, with businesses heavily relying on it for communication, marketing, and a variety of other purposes. However, sending and receiving emails at scale can be challenging, especially for businesses with a high volume of emails.

That's where Simple Mail Transfer Protocol (SMTP) services come in. SMTP services provide a reliable and fast way to send emails, ensuring that they reach their destination safely and securely.

In this article, we'll be discussing the top SMTP services that can help businesses with fast and efficient email delivery.

1. Coresender

Coresender caters to developers with its focus on APIs alongside SMTP integration, however, it may fall short in terms of user flexibility and email editing tools for non-technical users. Despite this, it offers a straightforward implementation process for developers and boasts reliable service with good deliverability.


  • Easy SMTP integration with various applications
  • Email API offered with four SDK libraries
  • Capability to create separate sending accounts for different purposes, such as transactional and marketing emails or for distinct marketing campaigns
  • Dedicated IP address available for Gold plan and above


  • Silver – €24.00 per month
  • Gold – €90.00 per month
  • Platinum – €320.00 per month
  • Enterprise – Contact sale

2. Sendinblue

Sendinblue is a versatile digital marketing tool designed for small and growing businesses, ecommerce sellers, and agencies that are seeking a comprehensive solution to get started with. In addition to email marketing and transactional email campaigns, Sendinblue also includes CRM, marketing automation, Facebook ads, chat, and other features. While email isn't the main focus of Sendinblue, it is a powerful tool for managing your email campaigns alongside other aspects of your marketing strategy.


  • Provides a range of tools, including email marketing and transactional email campaigns.
  • Sendinblue's API provides transactional email capabilities in several popular languages.
  • The platform includes an SMS feature for SMS marketing campaigns, expanding the reach of your marketing efforts.
  • Dedicated IP is available on the Enterprise plan for customers requiring high-volume email sending.
  • Sendinblue's A/B testing and segmentation features enable you to improve your marketing campaigns and better target your audience.


  • Free
  • Starter – $25.00 per month
  • Business – $65.00 per month
  • Enterprise – Contact sale

3. Amazon SES

Amazon Simple Email Service (SES) is budget-friendly SMTP service that is ideal for businesses with a tight budget. However, it does not offer many advanced features that are required to develop a comprehensive transactional email strategy. Although Amazon SES is highly scalable and flexible, it lacks the tools needed for easy advanced configuration. Therefore, while it is a cost-effective solution, it may not be the most feature-rich option available.


  • Provides three options to send emails: SMTP, Amazon SES console, and Amazon SES API (with Amazon SES SDK)
  • Includes Reputation and Deliverability dashboards to monitor events that may affect deliverability rates
  • Offers a mailbox simulator to test email delivery scenarios
  • Suitable for transactional emails, marketing emails, and bulk email notifications
  • Dedicated IP available as an add-on for high-volume senders


contact sales to request custom pricing

4. Mailjet

Mailjet, now owned by Sinch (Mailgun), has been providing emailing solutions since 2010. Its goal is to offer a user-friendly and powerful platform for businesses' customer communications. Collaboration is a key focus, with Mailjet striving to simplify email sending to allow businesses to concentrate on growth.


  • Mailjet offers both SMTP integration and an email API for sending emails securely.
  • Deliverability consultation is available for custom plans to ensure high email deliverability rates.
  • It provides drag and drop and rich-text email editors with real-time collaboration to make email creation easy for non-technical users.
  • Email automation feature allows creating automated workflows to save time and streamline processes.
  • SMS API is also available for sending text messages to customers.
  • Dedicated IP address is available for plans with a sending volume of 100k or more.


  • Free
  • Essential – $15.00 per month
  • Premium – $25.00 per month
  • Custom – Contact sale

5. SparkPost

SparkPost is a sought-after email platform for enterprises that send large volumes of emails, given its emphasis on scalability, deliverability, and regulatory compliance. It caters to the needs of businesses in the financial services and FinTech sectors for this reason.


  • SparkPost's Signals feature utilizes analytics and industry trends to identify possible email problems before they affect the business.
  • Email verification tool included.
  • Inbox tracker deliverability analytics tool offered.
  • Email API available, with libraries for several languages.
  • Competitive email intelligence tool provided.
  • Dedicated IP address available for Premier plans and above.


contact sales for more pricing details.


In conclusion, SMTP services have become a crucial part of fast and reliable email delivery for businesses of all sizes. With the plethora of options available in the market, businesses can choose from basic SMTP integration to more comprehensive digital marketing platforms. These services come with advanced features such as deliverability analytics, A/B testing, and email automation, allowing businesses to optimize their email marketing strategies for maximum engagement and ROI. Choosing the right SMTP service can make a significant impact on a business's success, and it's important to carefully evaluate options based on budget, needs, and desired features.

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