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Top 8 Managed Reliable Email Services API for Small to Big Businesses

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Email has proven itself to be one of the largest and most prevalent forms of communication and can play a major role in the online presence and communication of any business. An email services API can make things streamlined, with a wide range of email service API options available.

email services API through email validation api and verify email addresses importance

Despite the fact that the way through which we as people communicate has evolved, email is still prevalent, and you can find a lot of email services API options available. Almost anyone you meet likely has an email address. However, they might not be part of common social media platforms. Emails are a requirement to sign up anywhere and connect. This is especially the case within the business world. Email is here to stay and will likely not go anywhere for a while. Small as well as big businesses want to make their operations as cost-efficient as possible. 

What Is An Email Service API?

If you are curious what an API is, you can learn more here. There are numerous types of emails a business might want to send. From transactional emails, which are responses to triggers like sign-ups or password resets, to marketing emails, to correspondence and more.

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Businesses can send transactional emails through their own servers using Simple Mail Transfer Protocol (SMTP), for example. However, that can be difficult. One of the easiest alternatives to this is a transactional email API. These APIs can do the heavy lifting. They can manage email formatting, delivery, and anything else you might need. An email application programming interface (API) is responsible for providing applications access to functionality available within email platforms. This is how they aid with the process involved. 

How Can An API Assist Small And Big Businesses?

The best email API service can assist businesses in numerous ways. They can offer speed, security, ease of use, and affordability.  They can generate and send transactional emails, manipulate templates, and enable access to email metrics. An API email can essentially handle all required email functions. When they use cloud email delivery, they can make it easy to send emails. They can do all of this without requiring users to individually manage their servers or their operational requirements. They can also connect to other applications and enable them to use the functions of an email service.

The way they can assist businesses is seemingly endless.

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Using Email APIs For Success

Emails can look professional and be conversation starters. They can be cost-efficient, and they can work instantly. Emails can be an efficient way to promote new products and services or push newsletters and notifications.

What Are The Top 8 Managed Reliable Email Services API For Small To Big Businesses?

Using email APIs or other types of solutions can alleviate a lot of issues that might arise when it comes to sending transactional emails. Make sure to also learn what an API key is.

We have created a list of some of the best email APIs that are reliable and can provide a solid fit for numerous types of businesses.

1. Mailboxlayer API

The Mailboxlayer API is a simple and powerful email verification JSON API that utilizes SMTP, typo checks, and even has syntax validation. The API also offers free and disposable provider filtering. Furthermore, by utilizing its power, anyone can verify email addresses as they come into the system. This way, emails will only be sent to real customers and high-value contact. 

Moreover, the service offers 250 monthly requests for free. These requests are made by utilizing the easy-to-integrate URL structure, delivered in lightweight JSON format. Additionally, it is also secured through 256-bit HTTPS encryption.

All of these features make it one of the best options for those looking to leverage the power of managed reliable email services.

2. Amazon SES

Amazon SES (Simple Email Service) provides a flexible and scalable solution that can also enable developers to send emails from any application. This is an API for email.

The available email authentication options, alongside the IP deployment, can aid when it comes to deliverability. They can also protect the reputation of the sender and provide analytical data to measure every email’s overall impact.

They can configure this email API for various use cases, such as transactional and marketing email or communication on a massive scale. Amazon SES enables email receiving, and this can, in turn, let businesses stay connected to their customers. 

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3. Postmark

Postmark is a powerful email API meant for any use-case surrounding applications that rely on emails. Any company can begin sending emails using this email API service within a span of minutes.

The client has numerous libraries integrated for developers. Additionally, developers can use many different programming languages. Those proficient in Java, Python, PHP, or other supported languages can easily integrate Postmark. They can also leverage a reliable and secure SMTP service to unlock all of the delivery options.

4. Elastic Email

Elastic Email is an email marketing software that provides an API. Through it, anyone can use its cost-efficient delivery engine.

Furthermore, this is an email relay service that aims to serve as an all-in-one platform to provide companies full control over their transactional and marketing emails. Moreover, each user can gain instant notifications surrounding a variety of different prompts. This can include errors, clicks, whenever something gets opened, and so on.

5. Mailgun

Mailgun features an HTTP API, which can enable quick integration, scheduling, testing, and tracking of emails. It features a solid infrastructure and can provide advanced analytics. Additionally, this will allow any business to easily track its emails performance. This can allow anyone to get deep data through which they can improve their overall outcome.

6. Mailmodo

For those looking to send transaction emails quickly and essentially enhance their business process, Mailmodo can provide them with a solid solution. This is due to the fact that it can cover all of the grounds associated with an email addressing onboarding, password recovery, and other types of emails.

Get API access that is simple to integrate with incoming emails and email campaigns.


SMTP provides a reliable relay, as well as an email delivery service. It can enable users to track emails as well as send them. However, it also specializes in maintaining a solid reputation through the maintenance of high delivery rates. Furthermore, SMTP can also offer fast delivery with no latency. Make sure to learn what is SMTP.

8. SendGrid

SendGrid is a cloud-based SMTP provider, which allows anyone to send emails without the need to maintain email servers. It uses MTA to deliver billions of emails on a monthly basis. Furthermore, the platform can be used easily by developers, as it can integrate with SMTP or RESTful APIs. This can enable quick email delivery within the span of a few minutes. You can review the REST API interview questions. You can also learn what is SOAP vs REST.

email platform with reliable delivery through API endpoints that can reach million emails with simple email integration and other services with SMTP relay

How Do You Move Forward with Managed Email Service APIs?

We have gone over everything you need to know surrounding the top 8 managed reliable email services APIs for small and big businesses.

email campaign with email bounces and web application with contact list for easy integration with various programming languages

Hopefully, now you have a higher level of understanding as to how all of this works and how all of this can connect to your specific business use case. Remember that there are both paid as well as free options, many of which are easily accessible.

Frequently Asked Questions (FAQs)

What is an email API service?

An email API (application programming interface) service provides apps with access to functions available in email platforms. They can generate and send transactional emails. They can also manipulate templates or provide users access to email metrics.

Is there a free email API?

There are numerous free email API services available. They typically provide basic to advanced functionality. Based on your needs, they can get the job done well. Paid options provide additional functionality. 

Is Gmail API free?

This is dependent on the API calls required. Gmail API is available for free. However, it has usage limits when it comes to API calls. There is a daily usage limit and a per-user rate limit. These can consistently change. For some businesses, this might get the job done. However, paid options can be a lot more versatile. 


Simple Mail Transfer Protocol (SMTP) represents the rules that developers and systems follow when sending emails to a server. On the other hand, an API (application programming interface) is the communication method used throughout platforms and apps. SMTP tells computers to create and send messages to a server. APIs are how they get sent to another code or utility associated with them.

Sign up free to Mailboxlayer and experience its fabulous email services API features today!

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