Node.js, Send mail by Gmail. it is a simple code in Coffee Script, a full content for Node.js Taiwan Community contributor.

send_mail.coffee

nodemailer = require 'nodemailer'
fs = require 'fs' 

_sendMail = (email, code) ->
  contentHtml = [
    	"親愛的 Node.js 台灣社群朋友,"
    	"<p>"
    	"由於你的支持，社群活動才能夠得以持續進行，因此特別送上 JSDC 邀請碼，"
    	"<br/>"
    	"<br/>"
		"        JSDC 邀請碼："
		code
    	"<br/>"
    	"<br/>"
    	"煩請至以下連結進行登記報名"
    	"<br/>"
    	"        <a href='http://registrano.com/events/jsdc2013'>http://registrano.com/events/jsdc2013</a>"
    	"<br/>"
    	"</p>"
    	"<b>特別注意：</b>"
    	"<br/>"
    	"        JSDC 邀請碼請於 4/19 之前使用完畢，逾期後將取消此邀請碼"
    	"<p>"
    	"特此感謝，如有任何問題歡迎聯繫 [email protected]"
    	"</p>"
    	"---"
    	"<p>"
    	"Node.js Taiwan: http://nodejs.tw"
    	"<br/>"
    	"Node.js Book: http://book.nodejs.tw"
    	"<br/>"
    	"Node.js Github: https://github.com/nodejs-tw"
    	"<br/>"
    	"Node.js Facebook Group: https://www.facebook.com/groups/node.js.tw"
    	"</p>"
    ].join('')

	mailOptions = {
	    from: "Node.js Taiwan Contact<[email protected]>", 
	    to: email, 
	    subject: "[邀請] JSDC 社群邀請票", 
	    text: "感謝你今年的協助，明年請繼續支持\n 請持續支持此活動 \n 邀請碼為：" + 'abc123', 
	    html: contentHtml 
	}

	smtpTransport.sendMail mailOptions, (error, response) -> 
	    if(error)
	        console.log(error);
	    else
	        console.log("Message sent: " + response.message);

# Get invitor from a JSON file
_invitor = JSON.parse(fs.readFileSync './PATH/data.json')

smtpTransport = nodemailer.createTransport "SMTP", {
	    service: "Gmail",
	    auth: {
	        user: "email account",
	        pass: "email pwd"
	    }
	}

for user in _invitor
	_sendMail(user['email'], user['Invitation Code'])
	console.log user