Mandrill is pay as you go - so you could use the free plan and then just pay by the email when you send large bursts: http://mandrill.com/pricing/ http://mandri

Mandrill is pay as you go - so you could use the free plan and then just pay by the email when you send large bursts: http://mandrill.com/pricing/ http://mandrill.com/pricing/ The only issue you will run into is that Mandrill has a per day limit that only increases as your sending volume increases, so they first few times you might have to spread out the 30k over a few days.