Using Smtp To Send Email

Using Smtp To Send Email – Mailbox can be used to send email from Outlook using SMTP without affecting the ability to receive messages at an email address using an existing IMAP configuration. In this useful article, we show you how to configure the Outlook desktop client so that outgoing emails from your Outlook account are sent via Postmark. This help article uses Outlook for Mac 2016 for screenshots. Exact views may vary for other versions of Outlook.

This will bring up your Outlook accounts. Select the account you want to set up to use Postmark for sending.

Using Smtp To Send Email

Enter smtp for outgoing server. Set the port to 587 or 2525 and select the default port and use SSL to connect if not already checked.

Adjusting Email Notification Settings

Click More options… Get the Postmark Server API token from the Stream Settings page for the Postmark server. Change the Authentication field to ‘Username and password’ and enter your API server token in the username and password fields. Then click OK to save.

If you need to send your messages through a specific message flow, you can authenticate using the SMTP token instead of using the API server token. Check out the SMTP section of the How to Create and Send via Message Flow guide for help setting it up.

After configuring the output settings, send a test email from the account you have configured to use Postmark. An email message is sent by email using SMTP and is available for viewing in your email activity.

Note: The first time you send an email after changing your outgoing settings, you may be prompted to re-enter your password. Enter your API Server token again for the password and check the option to save the password so you don’t have to type it every time you send it.

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If the test email doesn’t go through, check your email activity to see if there are any SMTP API errors. To send from Outlook with Postmark, the email address you are sending from must be added to your email account as a sender signature. Learn how to send email with an ESP32 via an SMTP server. We show you how to send a simple email with HTML or plain text, and how to send attachments such as images and files (

We have a similar tutorial for the ESP8266 board: ESP8266 NodeMCU Send Emails Using SMTP Server: HTML, Text and Attachments (Arduino)

And it is the Internet standard for email delivery. To send email with the ESP32, you need to connect it to an SMTP server.

To send email with ESP32, we use the ESP-Mail-Client library. This library allows the ESP32 to send and receive email via SMTP and IMAP servers with or without attachments.

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In this guide, we will use SMTP to send email with and without attachments. As an example, we send an image (.png) and a text file (.txt). Files sent via e-mail can be stored on the ESP32 Filesystem (SPIFFS) or microSD card (not covered in this manual).

Before proceeding with this tutorial, you need to install the ESP-Mail-Client library. This library is not available for installation via the Arduino IDE Library Manager. Follow these steps to install the library:

So if you go to File>Examples>ESP-Mail-Client you will find several examples that you can try. You can also access the examples on the GitHub library page – here.

If you are using ESP32 with VS Code + PlatformIO, copy the following into your platformio.ini file to include the library.

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We recommend creating a new email account to send messages to your personal email address. Do not use your personal primary email to send email via ESP32. If something goes wrong with your code or you make too many requests, you may be banned or temporarily disable your account.

We use a newly created Gmail.com account to send emails, but you can use any other email provider. The recipient’s email can be your own without any problems.

Create a new email account to send email with ESP32. If you want to use a Gmail account, go to this link to create a new account.

You need to create an app password for ESP32 to send emails with your Gmail account. An app password is a 16-digit code that gives a less secure app or device access to your Google Account. Learn more about logging in with app passwords here.

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Now you should have the program password you use in the ESP32 code to send email.

If you use a different email provider, check how to create an application password. You should find instructions with a quick Google search “your_email_provider + create app password”.

If you are using a different email provider, you should check your SMTP server settings. Now you have everything you need to start sending emails with your ESP32.

The following code sends an email in HTML or plain text via an SMTP server. For demonstration purposes, the ESP32 will send an email once upon startup. Then you need to modify the code and import it into your projects.

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You will need to enter your network information as well as enter the sender email, SMTP server details, recipient and message.

This code is adapted from a sample provided by the library. The example is well explained so you can understand what each line of code does. Let’s take a look at the exact parts you need or need to replace.

Specify the SMTP server settings. If you use a Gmail account to send email, these settings are:

Set the message headers in the following lines in setup() – sender name, sender email, email subject and recipient name and email:

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If you want to send HTML text instead, comment out the following lines – you should put the HTML text in the htmlMsg variable.

Upload the code to your ESP32. After booting, open Serial Monitor with baud rate 115200. Press the ESP32 Reset button.

If you set the option to send a message with HTML text, the message looks like this:

In this section we will show you how to send attachments to your email sent by ESP32. We’ll show you how to send it

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File with sensor readings from the last few hours or send a picture taken by the ESP32-CAM.

To send files via e-mail, they must be stored in the ESP32 file system (SPIFFS). We upload the image and .txt file to the ESP32 SPIFFS using the ESP32 Filesystem Uploader plugin for the Arduino IDE. To install the add-on, if you haven’t already, follow the instructions below:

Create a new Arduino schematic and save it. Go to Sketch > Show Sketch Folder. Create a folder named data inside the Arduino sketch folder. Move the .jpg file and the .txt file to your data folder.

After transferring the files to the data folder, in the Arduino IDE, go to Tools > ESP32 Sketch Data Upload and wait for the files to upload.

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You should get a success message in the debug window. If the files have been uploaded, continue to the next section.

Note: If you start seeing a lot of dots ….___…..____ printed in the debug window, hold down the ESP32 button on the BOOT board until the files are loaded.

File and image attached. Before uploading the code, make sure to enter the sender’s email and recipient’s email settings.

This code is very similar to the previous code, so we will only look at the relevant parts for sending attachments.

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Then add the attachment details: file name, MIME type, file path, file storage type, and transfer encoding. In the following lines we send the image file.

If you want to send more attachments, you must call the following line before adding the next attachment:

After loading the code, open the serial monitor with a baud rate of 115200 and press the EN/RESET button on the board. If all goes well, you should get a similar message on the serial screen.

In this tutorial you learned how to send email with an ESP32 via an SMTP server. For this method to work, the ESP32 must have internet access.

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If you don’t want to use an SMTP server, you can also write a PHP script to send email notifications with an ESP32 or ESP8266 board.

You have learned how to send a simple email with text and attachments. When using applications, they must be stored in the ESP32 file system (SPIFFS) or on a microSD card (not covered in this manual).

The accompanying examples show how to send an email while the ESP32 is booting up. The idea is to modify the code and include it in your projects. For example, it can be useful to send a .txt file with a sensor reading, send a picture taken with the ESP32-CAM, use deep sleep to wake the board every hour, and send an email with information, etc.

Build web server projects with ESP32 and ESP8266 boards to monitor outputs and monitor sensors remotely. Learn HTML, CSS, JavaScript and client-server

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