Sending Email Without Smtp Server – JavaScript is a programming language that you can use for front-end and back-end development. When the name JavaScript is used in the context of sending emails, Node.js is the first thing that comes to mind. We even blogged about how to send email with Node.js. In this article, we want to change the perspective from the server side to the client side. Let’s find out how you can use JS to send emails from a non-backend application.
You cannot send emails using only JavaScript code due to the lack of support for server support. For this you need a server side language that talks to the SMTP server. JS can be used in conjunction with a server script that will send emails to the browser based on your requests. This is the value we will present below.
Sending Email Without Smtp Server
Normally, the server side of a normal application is responsible for sending emails. You will need to set up the server and the backend technology. The client side sends a request to the server side, which creates an email and sends it to the SMTP server. If you’re interested in what happens to email next, read our blog post, SMTP Relay.
What Is Starttls?
So why would anyone want to go the other way and send email right from the client side using JavaScript? This approach is very useful for creating contact forms or other types of user interaction in web applications, allowing your application to send emails without refreshing the page the user is interacting with. Plus, you don’t have to mess with server coding. This is a strong argument if your web application only uses email for contact forms. Below you will find some options for making your application send email from the client side.
Since you can’t send email directly with JS, you can tell your browser to open the default mail client for that. Technically speaking,
Method does not send email directly to the browser, but it can do the job. Check out how this code example works:
When the data is sent, the browser opens the default mail client. In our case, it’s Gmail.
How Using Gmail’s
SmtpJS is a free library that you can use to send emails from JavaScript. All you need is an SMTP server and some manipulation to get things done.
But before you proceed with shipping to production, you need to test the stage. Therefore, we will use the SMTP server credentials provided by the email sandbox to act as a virtual mailbox to receive test emails.
But an email sandbox is more than just a virtual mailbox. Rather, it is an email testing tool that developers use to validate and debug/resolve email by inspecting and fixing errors.
Thanks to email sandboxing, test emails held in staging never reach the right recipients. This means that no matter how long or complex your email testing process is, you’re never in danger of spamming the right recipients with them.
Send Mail Through Your Smtp Server
Email sandbox users are provided with automated test flows and scenarios, spam checking, blacklist reporting, HTML/CSS validation and other features.
We’ll talk more about HTML/CSS validation when we touch on HTML email. For now, let’s go back through the steps to send your first test email with SmtpJS while using the SMTP server credentials in the email sandbox.
The downside of the code example above is that your username and password are visible in the client-side script. This can be fixed by using the encryption option provided by SmtpJS. So click on the button to encrypt your SMTP credentials and fill in the required fields.
Next, hit Generate Security Token to use it in your JS function instead of the SMTP server parameters:
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Now we’ll take it a step further and show you code examples for sending an HTML email with an email with an attachment.
HTML Checker can be used to see the level of support of the best email clients for your HTML/CSS attributes. This will give you an idea of how your emails will appear in different inboxes.
For each email scanned with HTML Check, a report is produced that includes a breakdown of the top market support rate and email client support for individual HTML elements/CSS rules at the bottom, with links to the lines of code that are in error. and notes and additional information.
So when you send your HTML email using the code below, you can validate it using the HTML validation feature of the email sandbox.
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EmailJS.com was previously featured in our blog post Sending Emails with ReactJS. This service allows you to connect your email service, create an email template and send it from JavaScript without any server code. So let’s check the scope.
One of the main advantages of EmailJS.com is that typical email attributes are hidden. The template includes a recipient field and cannot be overridden in JS, so you send the template you’ve already configured.
Let’s test if EmailJS.com works by sending an email directly from the browser. We put together a virtual mailbox and an email sandbox and create a simple template. Now we need to create an HTML file with the following code:
EmailJS offers a free subscription that allows you to send up to 200 emails per month using just two templates. In addition, you will have a limited contact list and email size (up to 50 Kb). The highest quotas are available for paid subscriptions: Personal ($5/month), Professional ($15/month) and Business ($50/month).
Configuring The Smtp Settings
If you need to send emails quickly, easily and automatically in JavaScript, you need to use the Email API. Additionally, depending on the API you choose, you can also enjoy email analytics.
An email API that fits the description above is one that it offers as part of its email delivery platform as well as an email sandbox.
Email API is best described as a reliable email service that you can set up and use without any hassle.
With a sending throughput of up to ~10000 emails per second, the Email API will meet your sending needs. And thanks to a series of analysis features that can be used, it will also allow you to find and remove sending problems at an early stage that could reduce the delivery of your email.
Send Emails Through Your Own Smtp Server
First, you have on-time delivery alerts that let you know whenever there’s a delivery problem and tell you where to look for it. You also receive weekly availability reports.
Then there are dashboards and critical metrics that give you insight into the health of your email infrastructure.
In addition to the benefits of powerful analytics, Email API users have access to webhooks, dedicated IPs, automatic IP heating, blacklisting, and more.
So, to start using the email API inside your JavaScript application, you need to complete the following steps:
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Since it supports SMTP, you can choose a different path of API integration and simply set it up as an SMTP server in your project, application or email service to start sending emails.
SMTP credentials are very easy to find in the API and SMTP Integration section of the Email API->Sending Domain.
Although sending email is a server-side thing, you can avoid dealing with server-side coding. SmtpJS and EmailJS are two practical solutions to simplify your front-end and enable sending emails. EmailJS is better because it hides typical email attributes and you can send any template you configured earlier. Mailto: the method is different, but it can also be useful in some cases. But if you’ve changed your mind and are ready to set up a backend for your app, check out one of our dedicated blog posts:
Use cookies to improve your browsing experience, analyze traffic and display targeted ads. By continuing to use our website and app, you agree to our privacy and cookie policy. Accept In this tutorial you will learn how to send email with ESP8266 NodeMCU board using SMTP server. We’ll show you how to send an email using plain text, HTML text, and how to send attachments such as images and files (
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We have a similar tutorial for the ESP32 board: ESP32 sending email with SMTP server: HTML, text and attachments (Arduino IDE)
And is an Internet standard for email transmission. To send email from ESP8266, you need to connect it to an SMTP server.
We will use the ESP-Mail-Client library to send emails with the ESP8266 NodeMCU board. This library allows the ESP8266 to send and receive email with or without attachments via SMTP and IMAP servers. If you like this library and will use it in your projects, please consider supporting the developer’s work – see the library’s GitHub page.
In this tutorial, we will use SMTP to send emails with and without attachments. As an example, we will send a picture (
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) folder. Files you want to send via email can be stored in the ESP8266 file system (SPIFFS or LittleFS) or on a microSD card (not covered in this tutorial).
Before proceeding with this tutorial, you need to install the ESP-Mail-Client library. This library is not available for installation through the Arduino IDE library manager. Follow these steps to install the library:
Then
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