Send messages via MailGun and SendGrid delivery services

When it comes to sending messages via email, using reliable and efficient delivery services is crucial. Two popular and widely used services for mail delivery are MailGun and SendGrid. These services provide robust APIs that enable developers to seamlessly integrate email functionality into their Java applications.

In this blog post, we will explore how to send messages via MailGun and SendGrid delivery services using Java. Whether you are a Java developer looking to enhance your email delivery capabilities or someone interested in learning about these popular email delivery services, this post is for you.

By the end of this article, you will have a clear understanding of how to leverage MailGun and SendGrid APIs to deliver messages effectively and reliably from your Java application.

Understanding of MailGun and SendGrid services

MailGun is an email delivery service that provides a RESTful API for sending, receiving and tracking emails.

SendGrid is another email delivery service that provides a RESTful API for sending and tracking emails.

MailGun and SendGrid are indispensable solutions to email automation. Small-scale businesses just like big organizations wish to construct reliable communication between their staff members as well as customers and third parties. Irrespective of the traffic volume both of these services can manage your emails quickly and securely.

Use MailGun and SendGrid with their sophisticated spam filtering and email reputation management techniques to be sure that your emails are delivered to your recipients’ inboxes and not marked as spam.

Among the other features and benefits, there is an ability to trace and analyze emails. It means that you can track the number of people who opened your email, clicked on links within your email, or marked your email as spam. This information can help you understand which emails are performing well and which ones need improvement. You can also check the click-through rate (CTR) which refers to the percentage of people who clicked on a link within your email out of the total number of emails delivered.

Overall, by using the email analytics and tracking features provided by MailGun and SendGrid, you can gain insights into the effectiveness of your email campaigns and make data-driven decisions to optimize your email content, design, and targeting to improve engagement and conversions.

Java API to Create and Send Emails

In order to automate the process of creating and sending email messages, we will use Aspose.Email for Java a powerful API for manipulating and processing emails. It allows you to work with popular email delivery services including MailGun and SendGrid, providing a simple and reliable way to deliver your messages. Also, API supports popular email formats including MS Outlook messages such as MSG, EML/EMLX, etc. and mail storage formats such as PST, MBOX, OLM. To acquire the API, it is possible to either download or install it from our repository.

Prepare to use MailGun or SendGrid

To use MailGun or SendGrid, you need to have an account and an API key. You can sign up for a free account at and respectively.

Immediately after you have registered at one of these services and got an API key, you can start writing your code.

Set up email delivery services options

For a start, set up DeliveryServiceOptions of our Aspose.Email for Java library depending on which service you are going to use for sending messages.

MailGun client options:

SendGrid client options:

Send an email via MailGun or SendGrid

Having set all the necessary options, you can initialize the client using the DeliveryServiceClientFactory.

And finally, you can prepare an email message and use the send method of the IDeliveryServiceClient interface to send the email and get a response object that contains information about the status of the request.

Here is an example of how to send an email:


In this blog post, we explored how to send messages via MailGun and SendGrid using Java. We gained a clear understanding of these services, their features, and benefits. By leveraging their APIs, we learned how to create and send emails programmatically. By following the provided code examples and configuring the necessary options, you can seamlessly integrate MailGun or SendGrid into your Java application to enhance your email delivery capabilities, improve communication with your audience, and achieve better results from your email campaigns.

We also explored the Aspose.Email for Java API, which simplifies the process of creating and sending emails. It is a comprehensive set of Email Processing APIs that can be used to build cross-platform applications with the ability to create, manipulate, analyze, convert and transmit emails. You can explore the documentation of Aspose.Email for Java to learn more about the API.

See Also