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Top Email Sending and Testing Resources

How to Send Emails in a Replit App
On May 18, 2025
14min read
In this step-by-step guide, we’ll prompt Replit to create a React app and send emails from it using EmailJS and Mailtrap SMTP. Sending cases we’ll be covering include plain-text and HTML emails, multiple recipients, and emails with attachments.
Artem Litvinenko
Software Engineer

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This image is a symbolic graphic representation of using Bolt.new to create a react capture form that sends emails.

How to Send Emails in Bolt.new with a React App Using EmailJS
On May 01, 2025
18min read
Send emails from your React application created in Bolt. For this, we'll use EmailJS and Mailtrap SMTP, and send plain-text and HTML emails, emails with attachments, and more.
Artem Litvinenko
Software Engineer

+1 more author

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How to Send Emails in a Replit App
On May 18, 2025
14min read
In this step-by-step guide, we’ll prompt Replit to create a React app and send emails from it using EmailJS and Mailtrap SMTP. Sending cases we’ll be covering include plain-text and HTML emails, multiple recipients, and emails with attachments.
Artem Litvinenko
Software Engineer

+1 more author

This image is a symbolic graphic representation of using Bolt.new to create a react capture form that sends emails.

How to Send Emails in Bolt.new with a React App Using EmailJS
On May 01, 2025
18min read
Send emails from your React application created in Bolt. For this, we'll use EmailJS and Mailtrap SMTP, and send plain-text and HTML emails, emails with attachments, and more.
Artem Litvinenko
Software Engineer

+1 more author

How to Send Emails in Retool
On April 30, 2025
6min read
Send emails from your Retool contact forms via Maitlrap email API: plain-text and HTML emails, multiple recipients, attachments, and more!
Artem Litvinenko
Software Engineer

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This is a graphic representation of an email blacklist, for an article that covers the topic in detail.

Email Blacklists Explained: Causes, Solutions, Prevention
On January 24, 2025
9min read
Find out what an email blacklist is, how it works, what are the reasons to get blacklisted, and how to get off the blacklist and avoid it in the future.
Dzenana Kajtaz
Technical Content Writer @Mailtrap

Email Client Testing Explained
On September 02, 2024
11min read
Learn how to test emails in different email clients using Mailtrap, Litmus, Email on Acid, and more.
Diana Lepilkina
Content Specialist @Mailtrap

+1 more author

How to Automate Email Verification in Selenium
On August 09, 2024
9min read
Selenium can be a great tool for testing your email verification process. We describe how to set everything up in a few simple steps.
Aleksandr Varnin
Full Stack Developer @ Railsware

SendGrid Sandbox Mode Explained
On July 31, 2024
4min read
SendGrid offers a sandbox mode you can use to test your emails. We analyze how it works and give suggestions on proper email testing with SendGrid.
Oleksii Ianchuk
Product Lead @ Mailtrap
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Postfix vs. Sendmail vs. Exim
On February 18, 2025
6min read
Of the following MTAs of Postfix, Exim, and Sendmail, which would suit your project? Check out the selection criteria and explore which MTA prevails.
Yevhenii Odyntsov
Content @Mailtrap

What Is Secure Email Server & How Does It Work?
On February 04, 2025
9min read
Learn what a secure email server means, the role of email security, and how to make your email server secure. Click here.
Eric Wahlquist
Senior Content Marketing Manager
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Mailtrap robot holds a certificate to indicate Mailtrap acquiring ISO certification

Mailtrap Is Now ISO Certified 
On April 10, 2024
2min read
Mailtrap can now certify that we handle all the development processes in accordance with ISO standards. Learn what this means in this article.
Ketevan Bostoganashvili
Technical Content Writer @Mailtrap
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