Upgrade a connection to TLS in Go

Question

I have an open TCP connection and read from it with a for loop like so

for {
  // tx.Text is of type textproto.Conn
  // the underlying connection is stored          


        

Answer 1

Ditched swaks, built a small tool to test TLS using Go's own smtp.SendMail:

package main

import (
  "fmt"
  "net/smtp"
)

func main() {
  err := smtp.SendMail(
    "127.0.0.1:2525",
    nil,
    "src@test.local",
    []string{"dst@test.local"},
    []byte("Hello! Just testing."),
  )
  if err != nil {
    panic(err)
  }
}