Sending emails through esp8266

Hi,

I didn't really understand it all (it probably needs a diagram), but it seems you're looking for a way of sending e-mails using an ESP8266.

There are plenty of resources on it online, e.g.: https://microcontrollerslab.com/esp8266-send-email-smtp-server-arduino-ide/

Personally I think you need to re-think this, and move to an ESP32, or Pi Pico W. The ESP8266 is quite underpowered, I cannot see the reason for using it for a school project, when your life will be much easier with a more powerful device with a lot more modern code/tutorials online. The ESP8266 is pretty ancient.

In any case, whatever you choose, it's a bit of a hack. It's not normally expected for a microcontroller to send e-mails. But there will be plenty of examples (perhaps hundreds!) online.

As has already been suggested you need to create a list of requirements. Make a list of all the things you want it to do. A diagram may help you explain what it is you are trying to do. The requirements are what you build to. Include in your requirements any hardware requirements you can think of.

I found these two in the Arduino IDE - the interface that you will use to program the ESP8266.  There are a lot of good (free) references on the internet, but nothing beats the example programs found in the Arduino IDE.

Check out Arduino.cc for more help.

 Tehkel  One. I have owned an ISP phoenixcomm.net an email server or SMPT server can be HACKED and they're a major pain in the tush. instead of email etc. why not use low-power RFID (NF), alas, they don't all have this capability. So that will not work for everybody. 

Second way. send a text message to their phone.  Now this works but wait. Some older folks don't even have a mobile phone or know anything about text. 

BEST WAY off the TOP of the Head Instead of generating passwords (Breaks #2) use their phone number. easy peasy. ~~ C Harrison

Use AWS IoT core and publish messages to AWS endpoint.create a rule that will be triggered when your threshold is exceeded,create a SNS topic that will send mail to receiver, link that sns topic to rule. 

"Throw the horse out the window so hay!" I need to get out an email lexicon to translate those requirements. I had the same experience working with Perl programmers.

Sorry for that! Maybe one day I'll make a detailed and easily understandable post on how to use AWS IoT rule engine to send emails! 

I made an overview from MQTT to mail for a project14: 

 Manage Arduino MKR WIFI 1010 Battery Life in the Cloud - AWS, Graphs and Alerts