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espressif / esp-idf

Espressif IoT Development Framework. Official development framework for Espressif SoCs.
Apache License 2.0
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examples/protocols/smtp_client (IDFGH-7983) #9494

Open nopnop2002 opened 2 years ago

nopnop2002 commented 2 years ago

Environment

$ idf.py --version
ESP-IDF v5.0-dev-4037-g9b8c558e63-dirty

Problem Description

To help keep your account secure, from May 30, 2022, Google no longer supports the use of third-party apps or devices which ask you to sign in to your Google Account using only your username and password.

As a result, examples/protocols/smtp_client does not work properly.

Debug Logs

220 smtp.googlemail.com ESMTP im22-20020a170902bb1600b0016bdeb58611sm2901483plb.112 - gsmtp
I (14233) smtp_example: Writing EHLO to server...

250-smtp.googlemail.com at your service, [61.211.140.68]
250-SIZE 35882577
250-8BITMIME
250-STARTTLS
250-ENHANCEDSTATUSCODE
S
250-PIPELINING
250-CHUNKING
250 SMTPUTF8
I (14443) smtp_example: Writing STARTTLS to server...

220 2.0.0 Ready to start TLS
I (14623) smtp_example: Performing the SSL/TLS handshake...
I (15973) smtp_example: Verifying peer X.509 certificate...
I (15973) smtp_example: Certificate verified.
I (15973) smtp_example: Cipher suite is TLS-ECDHE-ECDSA-WITH-AES-128-GCM-SHA256
I (15983) smtp_example: Authentication...
I (15983) smtp_example: Write AUTH LOGIN
I (16273) smtp_example: Write USER NAME
I (16483) smtp_example: Write PASSWORD
I (16893) smtp_example: write_ssl_and_get_response=535
E (16903) smtp_example: Last error was: -0xfffffde9 - UNKNOWN ERROR CODE (0200) : UNKNOWN ERROR CODE (0017)
vikramdattu commented 2 years ago

Hi @nopnop2002 thanks for pointing out that google stopped Less secure apps option.

There however is a workaround to still make this example useful. You need to generate special app password. I found this on StackOverflow: https://stackoverflow.com/a/72626684/3249583

nopnop2002 commented 2 years ago

@vikramdattu

There however is a workaround to still make this example useful.

I tried this. It's work fine.

I (14363) smtp_example: Writing STARTTLS to server...

220 2.0.0 Ready to start TLS
I (14623) smtp_example: Performing the SSL/TLS handshake...
I (15953) smtp_example: Verifying peer X.509 certificate...
I (15953) smtp_example: Certificate verified.
I (15953) smtp_example: Cipher suite is TLS-ECDHE-ECDSA-WITH-AES-128-GCM-SHA256
I (15963) smtp_example: Authentication...
I (15963) smtp_example: Write AUTH LOGIN
I (16203) smtp_example: Write USER NAME
I (16623) smtp_example: Write PASSWORD
I (16923) smtp_example: write_ssl_and_get_response=235
I (16923) smtp_example: Write MAIL FROM
I (17123) smtp_example: Write RCPT
I (17333) smtp_example: Write DATA
I (17643) smtp_example: Write Content
I (19173) smtp_example: Email sent!

However, the procedure is complicated. I would like to wait for an official fix.