One question on this, how exactly is this ESP32 email library implemented? Because I think negotiating a TLS1.2 connection, might be beyond the abilities of an

One question on this, how exactly is this ESP32 email library implemented? Because I think negotiating a TLS1.2 connection, might be beyond the abilities of an ESP32. You'd need your own 'friendly' email server that is expecting traffic from that specific IoT device, allowing outbound relay through it. One of the challenges of doing outbound SMTP from randomly located IoT devices is that due to weirdness of cellular or other uplinks, it might appear from a wide range of IPs. Normally if I have some old weird monitoring device on a network that needs to send unauthenticated SMTP outbound for alerting, I can give postfix an ACL for its specific static /32, but that can't be a good solution for something like this...