title: Create Drip Email Campaigns Rails
body: <p>I have a Rails app that I'm trying to create a drip email campaign for. Basically what I'm imagining is after someone signs up, I send them a specific email 2 days after signup, another a week after signup, and another a month after signup.</p>
  
  <p>What's the best way to do this? Is there a gem that makes it easy, or some third-party email provider that does it well? I already use SendGrid to send email and looking through their API I didn't find anything that does exactly this. Thanks for any help!</p>