php - site on server A, want to send its email from server B -

i have rather messy situation can't seem think of way resolve.

1 - maintaining live site on shared host, hosting company has limit of 250 emails/hour (or 250 smtp relays per hour). site dating site generates lot of email, limit being reached pretty regularly.

2 - have vps can sent unlimited emails.

i want use 2 send emails 1. obvious answer move site server 2, not option currently.

both setups php/mysql.

thanks in advance.

security considerations

• host 2 should have ssl(because have vps , maybe enabled) . otherwise other user shared hosting sniff packets because sent in plain text if host 2. should keep close @ mail logs.

solution a

1. when want sent email 1 2 make asynchronous request(if needed) 1 2. when request asynchronously users not have wait email sent. example use snippet achieve that. url 2 should url that's hard guess sort of security measurement(basic). example https://www.myvps.com/gfgfdgfdgfcascxzsdadf3rfdfvs3fd (just random string).

2. from url 2just post fields , sent e-mail. guess pretty simple solution implement.

advantages:

• simple implement

disadvantages:

• could have scaling issues. each time url 2 gets called new process going spawned , there no way throttle sending e-mails. don't think use case hit wall.
• if host 2 not have ssl system unsafe.

solution b:

you use google app engine(gae) sending emails. first 1000 mails free , after cost $0.0001 per recipients emailed.

advantages:

• easy implement(python pretty nifty language). there no need asynchronous request because gae's mail asynchronous.
• gae has ssl support connection server 1 can not sniffed.
• it scales because on gae.

disadvantage:

• sending email cost money. maybe drop vps , go gae instead(save money?).

solution c:

this solution requires install node.js enviroment(but because on vps should not problem). node.js requires python(>=2.4) install node.js.

advantages:

• insanely fast. don't think need throttling.
• easy implement(node.js/javascript nice). again no need asynchronous request because node.js asynchronous.
• scales(easily) because can throttling no effort.

disadvantages:

• has dependencies(node.js). , node packages(express, connect, node-email)
• could unsafe if not having ssl.

code

i wrote email service in node in couple of minutes.

const port = 4000; const host = 'localhost';  const lib = require('email'); lib.from = ''; // #should set e-mail want sent from. const email = lib.email; const express = require('express');  var app = module.exports = express.createserver(       express.bodydecoder() );  app.post('/secret', function(req, res, params) {     var = req.body.to;     var subject = req.body.subject;     var body = req.body.body;      if (!(to && subject && body)) {         return res.send('param missing');     }      res.send('+ok');      var mail = new email({         to: to,         subject: subject,          body: body     });      mail.send(function(err){         if (err) console.log(err);     }); });  if (!module.parent) {     app.listen(port, host);     console.log("express server listening on port %d", app.address().port) }