gmail-stmp-ssl.lua

local account = "blah@gmail.com"  -- use your own gmail account
local password = "password"  -- if you enable 2-phase authentication, you need to
                             -- generate and use a application-specific password here...
local sender_name = "Jon Snow"
local recipient = "recipient@foo.com"
local recipient_name = "Arya Stark"

--------------------------------------------------------

local find = ngx.re.find
local gsub = ngx.re.gsub
local sub = string.sub
local tostring = tostring
local tonumber = tonumber
local encode_base64 = ngx.encode_base64

local sock

local function send_cmd(cmd)
    assert(sock:send(cmd .. "\r\n"))
    ngx.say(">> ", cmd)

    do
        local lines = {}
        local i = 0
        local line = assert(sock:receive())
        while true do
            local fr, to, err = find(line, [[^(\d+)-]], "jo", nil, 1)
            if err then
                error("failed to call ngx.re.find: " .. tostring(err))
            end
            if not fr then
                break
            end
            local status = tonumber(sub(line, fr, to))
            if status >= 400 then
                return nil, line
            end
            i = i + 1
            lines[i] = line
            line = assert(sock:receive())
        end

        local fr, to, err = find(line, [[^(\d+) ]], "jo", nil, 1)
        if err then
            error("failed to call ngx.re.find: " .. tostring(err))
        end
        if not fr then
            error("syntax error: " .. line);
        end
        local status = tonumber(sub(line, fr, to))
        if status >= 400 then
            return nil, line
        end

        i = i + 1
        lines[i] = line
        ngx.say(table.concat(lines, "\n"))
    end

    return true
end

sock = ngx.socket.tcp()
assert(sock:connect("smtp.gmail.com", 465))

assert(sock:sslhandshake())

local line = assert(sock:receive())
ngx.say(line)

assert(send_cmd("EHLO smtp.gmail.com"))  -- well, we could verify the SSL handshake here...

local auth = ngx.encode_base64("\0" .. account .. "\0" .. password)
assert(send_cmd("AUTH PLAIN " .. auth))
assert(send_cmd("MAIL FROM:<" .. account .. ">"))  -- well, you could use a different email address than
                                           -- the one specified in the account variable if you
                                           -- have configured alternative "send email as" entries
                                           -- in your gmail account

assert(send_cmd("RCPT TO:<" .. recipient .. ">"))

assert(sock:send("DATA\r\n"))
assert(sock:send("FROM: " .. sender_name .. " <" .. account .. ">\r\n"))
assert(sock:send("Subject: " .. mail_title .. "\r\n"))
assert(sock:send("To: " .. recipient_name .. " <" .. recipient .. "\r\n"))
assert(sock:send("Content-Transfer-Encoding: base64\r\n"))
assert(sock:send("Content-Type: text/html; charset=utf-8\r\n\r\n"))
assert(sock:send(gsub(encode_base64(mail_body), [[(.{76})]], "$1\n", "jo") .. "\n"))

assert(send_cmd("\r\n."))
assert(send_cmd("QUIT"))
assert(sock:close())

root@lb-waf:/etc/apache2# lua sendmailss.lua
lua: sendmailss.lua:10: attempt to index global 'ngx' (a nil value)
stack traceback:
sendmailss.lua:10: in main chunk
[C]: in ?

help please