| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C6 | ESP32-H2 | ESP32-S2 | ESP32-S3 | | ----------------- | ----- | -------- | -------- | -------- | -------- | -------- | -------- | # SMTP Client Example The Example is SMTP client demo. It sends and email with attachment to recipient. ## How to use the example ### Configure the project ``` idf.py menuconfig ``` * Configure Wi-Fi or Ethernet under "Example Connection Configuration" menu. See "Establishing Wi-Fi or Ethernet Connection" section in [examples/protocols/README.md](../README.md) for more details. Please set the following parameters under example config for SMTP client demo to work: - Email server, port, sender's email ID, password, recipient's email ID. ### Build and Flash Build the project and flash it to the board, then run monitor tool to view serial output: ``` idf.py -p PORT flash monitor ``` (Replace PORT with the name of the serial port to use.) (To exit the serial monitor, type ``Ctrl-]``.) See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects. ## Example output ``` I (3212) smtp_example: Loading the CA root certificate... I (3212) smtp_example: Setting hostname for TLS session... I (3222) smtp_example: Setting up the SSL/TLS structure... I (3232) smtp_example: Connecting to smtp.googlemail.com:587... I (3542) smtp_example: Connected. 220 smtp.googlemail.com ESMTP r62sm20390571pfc.89 - gsmtp I (3952) smtp_example: Writing EHLO to server... 250-smtp.googlemail.com at your service, [182.75.158.118] 250-SIZE 35882577 250-8BITMIME 250-STARTTLS 250-ENHANCEDSTATUSCOD ES 250-PIPELINING 250-CHUNKING 250 SMTPUTF8 I (4262) smtp_example: Writing STARTTLS to server... 220 2.0.0 Ready to start TLS I (4562) smtp_example: Performing the SSL/TLS handshake... I (5692) smtp_example: Verifying peer X.509 certificate... I (5692) smtp_example: Certificate verified. I (5692) smtp_example: Cipher suite is TLS-ECDHE-RSA-WITH-AES-128-GCM-SHA256 I (5702) smtp_example: Authentication... I (5702) smtp_example: Write AUTH LOGIN I (6002) smtp_example: Write USER NAME I (6302) smtp_example: Write PASSWORD I (6822) smtp_example: Write MAIL FROM I (7132) smtp_example: Write RCPT I (7432) smtp_example: Write DATA I (8252) smtp_example: Write Content I (10202) smtp_example: Email sent! ``` ## Note: - You might need to enable permission for less secure apps from email provider. This is because these email providers (e.g. gmail) insist on OAUTH authorization.