How to automate a series of emails to be sent to a lead, one every few days?

How to automate a series of emails to be sent to a lead, one every few days?

I'm interested in automating a series of emails to be sent every 4 or 5 days after the creation of the lead. Is there any way to do that without manual intervention?

Here's the situation -- when we get a new lead, we send an email requesting some information. If we don't hear back from the lead, then we want to send a second email 4 days later. If we DO hear back from the lead, we do NOT want to send the 2nd email. Is there a way for me to set this up?