Sending e-mail node using SendGrid service
Default e-mail node sometimes encounters login problem occurred from unusual behavior. For example, Gmail authentication will show an alert when Node-RED runtime is located in the different location from user's local PC or smart phone. SendGrid node is able to solve the problem because SendGrid service ensures sending e-mail.
(1) Install SendGrid node (node-red-contrib-sendgrid) using manage palette in Node-RED
(2) Get API key from SendGrid website ( https://sendgrid.com/ )
(3) Paste the API key on property of SendGrid node
(4) Create flows using SendGrid node
Sends the msg.payload as an email, with a subject of msg.topic. The default message recipient can be configured in the node, if it is left blank it should be set using the msg.to property of the incoming message. you can also specify msg.cc and/or msg.bcc properties. You can set sender of msg.from in the payload.