Example code missing items

[Maxxxxxx-x]

It seems like using tls will cause a Lua TCP socket read timed out

With tls set to false, receive_response (line 8) also throws a time out in the while loop's socket:receive() line

[Maxxxxxx-x]

Update: I have managed to narrow it down to being a 504 Unrecognized Authentication Type, Currently using Port 587 with STARTTLS as true

[Maxxxxxx-x]

I resolved the issue by adding in a auth_type to mailer

local mailer, err = mail.new({
        host = mail.group.com.hk,
        port = 587,
        starttls = true, --based on your port
        username = Username,
        password = "password",
        auth_type = "login"
    })

    if err then
        ngx.log(ngx.ERR, "mailer error: ", err)
        return ngx.exit(ngx.HTTP_INTERNAL_SERVER_ERROR)
    end